syntactician · April 17, 2017 15:04
diff --git a/01.c b/01.c
 #include <assert.h>
 #include "b64.h"
 #include "hex.h"
 #include "util.h"

 #define INPUT (unsigned char *) \
 	"49276d206b696c6c696e6720796f757220627261696e206c" \
 	"696b65206120706f69736f6e6f7573206d757368726f6f6d"
 #define OUTPUT (unsigned char *) \
 	"SSdtIGtpbGxpbmcgeW91ciBicmFpbiBs" \
 	"aWtlIGEgcG9pc29ub3VzIG11c2hyb29t"

 unsigned char *
 hex_to_b64(unsigned char *s)
 {
 	unsigned char *out, *tmp;

 	tmp = hex_decode(s);
 	out = b64_encode(tmp);
 	free(tmp);
 	return out;
 }

 int
 main(void)
 {
 	assert(!strcmp_unsigned(hex_to_b64(INPUT), OUTPUT));
 	return 0;
 }
diff --git a/02.c b/02.c
 #include <assert.h>
 #include "xor.h"
 #include "util.h"

 #define INPUT1 (unsigned char *) "1c0111001f010100061a024b53535009181c"
 #define INPUT2 (unsigned char *) "686974207468652062756c6c277320657965"
 #define OUTPUT (unsigned char *) "746865206b696420646f6e277420706c6179"

 int
 main(void)
 {
 	assert(!strcmp_unsigned(xor_hex(INPUT1, INPUT2), OUTPUT));
 	return 0;
 }
diff --git a/03.c b/03.c
 #include <assert.h>
 #include <stdio.h>

 #include "hex.h"
 #include "score.h"
 #include "util.h"

 #define INPUT (unsigned char *) \
 	"1b37373331363f78151b7f2b783431333d78397828372d363c78373e783a393b3736"
 #define OUTPUT (unsigned char *) \
 	"Cooking MC's like a pound of bacon"

 int
 main(void)
 {
 	assert(!strcmp_unsigned(OUTPUT, best_xor(hex_decode(INPUT))));
 	return 0;
 }
diff --git a/03.js b/03.js
 function getChi2 (str) {
  var english_freq = [
    0.08167, 0.01492, 0.02782, 0.04253, 0.12702, 0.02228, 0.02015, // A-G
    0.06094, 0.06966, 0.00153, 0.00772, 0.04025, 0.02406, 0.06749, // H-N
    0.07507, 0.01929, 0.00095, 0.05987, 0.06327, 0.09056, 0.02758, // O-U
    0.00978, 0.02360, 0.00150, 0.01974, 0.00074 // V-Z
  ]
  var count = [], ignored = 0
  for (var i = 0; i < 26; i++) count[i] = 0

  for (var i = 0; i < str.length; i++) {
    var c = str.charCodeAt(i)
    if (c >= 65 && c <= 90) count[c - 65]++; // uppercase A-Z
    else if (c >= 97 && c <= 122) count[c - 97]++; // lowercase a-z
    else if (c >= 32 && c <= 126) ignored++; // numbers and punct.
    else if (c == 9 || c == 10 || c == 13) ignored++; // TAB, CR, LF
    else return Infinity; // not printable ASCII = impossible(?)
  }

  var chi2 = 0, len = str.length - ignored
  for (var i = 0; i < 26; i++) {
    var observed = count[i], expected = len * english_freq[i]
    var difference = observed - expected
    chi2 += difference * difference / expected
  }
  return chi2
 }

 console.log(getChi2('Cooking MCs like a pound of bacon'))
 console.log(getChi2('""&$#*m'))
 console.log(getChi2('�����������������������������'))
diff --git a/04.c b/04.c
 #include <float.h>
 #include <stdio.h>

 #include <assert.h>
 #include "hex.h"
 #include "score.h"
 #include "util.h"

 #define INPUT "4.txt"
 #define OUTPUT "Now that the party is jumping"

 int
 main(void)
 {
 	FILE *fp = fopen(INPUT, "r");
 	char *line = NULL;
 	unsigned char *best = NULL, *src, *tmp;
 	size_t len, line_size;
 	float min = FLT_MAX, score;

 	while (!(getline(&line, &line_size, fp) < 0)) {
 		src = hex_decode(line);
 		tmp = best_xor(src);

 		if (!best) {
 			best = tmp;
 			printf("fuck?\n");
 		} else {
 			printf("working!\n");
 			score = chi2(tmp, strlen_unsigned(src));
 		}
 		/* printf("%s -- %.2f\n", best, min); */
 	}

 	/* assert(!strcmp_unsigned(OUTPUT, best_candidate_xor(INPUT))); */
 	return 0;
 }
diff --git a/4.txt b/4.txt
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diff --git a/b64.c b/b64.c
 #include "b64.h"
 #include "util.h"

 static const unsigned char b64_e[] = {
 	'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
 	'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
 	'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
 	'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
 	'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
 	'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
 	'w', 'x', 'y', 'z', '0', '1', '2', '3',
 	'4', '5', '6', '7', '8', '9', '+', '/'
 };

 static const unsigned char b64_d[] = {
 	['A'] = 0,  ['B'] = 1,  ['C'] = 2,  ['D'] = 3,
 	['E'] = 4,  ['F'] = 5,  ['G'] = 6,  ['H'] = 7,
 	['I'] = 8,  ['J'] = 9,  ['K'] = 10, ['L'] = 11,
 	['M'] = 12, ['N'] = 13, ['O'] = 14, ['P'] = 15,
 	['Q'] = 16, ['R'] = 17, ['S'] = 18, ['T'] = 19,
 	['U'] = 20, ['V'] = 21, ['W'] = 22, ['X'] = 23,
 	['Y'] = 24, ['Z'] = 25, ['a'] = 26, ['b'] = 27,
 	['c'] = 28, ['d'] = 29, ['e'] = 30, ['f'] = 31,
 	['g'] = 32, ['h'] = 33, ['i'] = 34, ['j'] = 35,
 	['k'] = 36, ['l'] = 37, ['m'] = 38, ['n'] = 39,
 	['o'] = 40, ['p'] = 41, ['q'] = 42, ['r'] = 43,
 	['s'] = 44, ['t'] = 45, ['u'] = 46, ['v'] = 47,
 	['w'] = 48, ['x'] = 49, ['y'] = 50, ['z'] = 51,
 	['0'] = 52, ['1'] = 23, ['2'] = 54, ['3'] = 55,
 	['4'] = 56, ['5'] = 57, ['6'] = 58, ['7'] = 59,
 	['8'] = 60, ['9'] = 61, ['+'] = 62, ['/'] = 63
 };

 unsigned char *
 b64_encode(const unsigned char *s)
 {
 	unsigned char *out = (unsigned char *)malloc(4*strlen_unsigned(s)/3);
 	size_t i, j;
 	/* unsigned char x, y, z; */

 	for (i = 0, j = 0; j < strlen_unsigned(s); j += 3) {
 		/* x = str[j++]; */
 		/* y = str[j++]; */
 		/* z = str[j++]; */

 		out[i++] = b64_e[       s[j] >> 2                              ];
 		out[i++] = b64_e[(077 & s[j] << 4) | s[j+1] >> 4               ];
 		out[i++] = b64_e[(077 &              s[j+1] << 2) | s[j+2] >> 6];
 		out[i++] = b64_e[ 077 &                             s[j+2]     ];

 	}
 	out[i] = '\0';
 	return out;
 }
diff --git a/b64.h b/b64.h
 unsigned char *b64_encode(const unsigned char *s);
diff --git a/hex.c b/hex.c
 #include "hex.h"
 #include "util.h"

 static const unsigned char hex_e[] = {
 	'0', '1', '2', '3',
 	'4', '5', '6', '7',
 	'8', '9', 'a', 'b',
 	'c', 'd', 'e', 'f',
 };

 static const unsigned char hex_d[] = {
 	['0'] = 0,  ['1'] = 1,  ['2'] = 2,  ['3'] = 3,
 	['4'] = 4,  ['5'] = 5,  ['6'] = 6,  ['7'] = 7,
 	['8'] = 8,  ['9'] = 9,  ['a'] = 10, ['b'] = 11,
 	['c'] = 12, ['d'] = 13, ['e'] = 14, ['f'] = 15,
 };

 unsigned char *
 hex_encode(const unsigned char *s)
 {
 	unsigned char *out = (unsigned char *)malloc(strlen_unsigned(s) * 2 + 1);
 	size_t i, j;

 	for (i = 0, j = 0; i < strlen_unsigned(s); ++i) {
 		out[j++] = hex_e[ (s[i] >> 4) & 0xF ];
 		out[j++] = hex_e[  s[i]       & 0xF ];
 	}
 	out[j] = '\0';
 	return out;
 }

 unsigned char *
 hex_decode(const unsigned char *s)
 {
 	unsigned char *out = (unsigned char *)malloc((strlen_unsigned(s)/2)+1);
 	size_t i, j;

 	for (i = 0, j = 0; j < strlen_unsigned(s); ++i, j += 2 )
 		out[i] = (hex_d[s[j]] << 4) + hex_d[s[j+1]];
 	out[i] = '\0';
 	return out;
 }
diff --git a/hex.h b/hex.h
 unsigned char *hex_encode(const unsigned char *s);
 unsigned char *hex_decode(const unsigned char *s);
diff --git a/makefile b/makefile
 CC = cc
 CFLAGS = -std=c99 -Wall -Wextra -Wpedantic

 SRC = b64.c hex.c score.c util.c xor.c
 TST = 01.c 02.c 03.c 04.c
 OBJ = ${SRC:.c=.o}
 EXE = ${TST:.c=}

 all: ${EXE}

 01: ${OBJ} 01.o
 	${CC} ${OBJ} [email protected] -o $@

 02: ${OBJ} 02.o
 	${CC} ${OBJ} [email protected] -o $@

 03: ${OBJ} 03.o
 	${CC} ${OBJ} [email protected] -o $@

 04: ${OBJ} 04.o
 	${CC} ${OBJ} [email protected] -o $@

 all: ${OBJ} ${EXE}

 clean:
 	rm -f ${OBJ} ${EXE} ${TST:.c=.o}

 .PHONY: all clean
diff --git a/score.c b/score.c
 #include <stdio.h>

 #include <float.h>
 #include <stdlib.h>
 #include <string.h>
 #include "util.h"
 #include "xor.h"

 #define SQUARE(X) ((X)*(X))

 static const double freq[] = {
 	0.0651738, 0.0124248, 0.0217339, 0.0349835, /* 'A' -- 'D'      */
 	0.1041442, 0.0197881, 0.0158610, 0.0492888, /* 'E' -- 'H'      */
 	0.0558094, 0.0009033, 0.0050529, 0.0331490, /* 'I' -- 'L'      */
 	0.0202124, 0.0564513, 0.0596302, 0.0137645, /* 'M' -- 'P'      */
 	0.0008606, 0.0497563, 0.0515760, 0.0729357, /* 'Q' -- 'S'      */
 	0.0225134, 0.0082903, 0.0171272, 0.0013692, /* 'T' -- 'W'      */
 	0.0145984, 0.0007836, 0.1918182             /* 'X' -- 'Z', ' ' */
 };

 float
 chi2(const unsigned char *s, size_t len)
 {
 	float score = 0;
 	size_t i;
 	size_t ignored = 0;
 	/* size_t len = strlen_unsigned(s); */
 	unsigned int count[27] = {0};

 	if (len)
 		if (len != strlen_unsigned(s))
 			return FLT_MAX;
 	else
 		len = strlen_unsigned(s);

 	for (i = 0; i < len; ++i) {
 		unsigned char c = s[i];

 		if (c == 9 || c == 10 || c == 13) {
 			++ignored;
 		} else if (c < ' ' || c > '~') {
 			return FLT_MAX;
 		} else if (c >= 'A' && c <= 'Z') {
 			count[c - 'A'] += 1;
 		} else if (c >= 'a' && c <= 'z') {
 			count[c - 'a'] += 1;
 		} else if (c == ' ') {
 			count[26] += 1;
 		} else {
 			++ignored;
 		}
 	}

 	/* score += SQUARE(ignored); */
 	len -= ignored;

 	for (i = 0; i < 27; ++i) {
 		float dif, exp, obv;

 		obv = count[i];
 		exp = len * freq[i];
 		dif = obv - exp;

 		score += SQUARE(dif) / exp;
 	}
 	return score;
 }

 unsigned char *
 best_xor(const unsigned char *s)
 {
 	size_t len = strlen_unsigned(s);
 	unsigned char c;
 	unsigned char *best = NULL;
 	unsigned char key[len+1];
 	unsigned char *tmp;
 	float score, min = FLT_MAX;

 	key[len] = '\0';

 	for (c = 1; c < 255; ++c) {
 		memset(key, c, len);
 		tmp = xor_bytes(s, key);
 		if ((score = chi2(tmp, len)) < min) {
 			min = score;
 			free(best);
 			best = tmp;
 		} else {
 			free(tmp);
 		}
 	}
 	return best;
 }
diff --git a/score.h b/score.h
 double chi2(const unsigned char *s, size_t len);
 unsigned char *best_xor(const unsigned char *s);
diff --git a/util.c b/util.c
 #include <stdlib.h>
 #include "util.h"

 int
 strcmp_unsigned(const unsigned char *s1, const unsigned char *s2)
 {
 	while ((*s1) && (*s1 == *s2)) {
 		++s1;
 		++s2;
 	}
 	return *s1 - *s2;
 }

 size_t
 strlen_unsigned(const unsigned char *s)
 {
 	size_t r;

 	for (r = 0; *s; ++s)
 		++r;
 	return r;
 }
diff --git a/util.h b/util.h
 #include <stdlib.h>

 int strcmp_unsigned(const unsigned char *s1, const unsigned char *s2);
 size_t strlen_unsigned(const unsigned char *s);
diff --git a/xor.c b/xor.c
 #include "hex.h"
 #include "util.h"

 #define MAX(X,Y) ((X)>(Y)?(X):(Y))

 unsigned char *
 xor_bytes(const unsigned char *x, const unsigned char *y)
 {
 	size_t len = MAX(strlen_unsigned(x), strlen_unsigned(y));
 	unsigned char *out = (unsigned char *)malloc(len+1);
 	size_t i;

 	for (i = 0; i < len; ++i)
 		out[i] = x[i] ^ y[i];
 	out[i] = '\0';
 	return out;
 }

 unsigned char *
 xor_hex(const unsigned char *x, const unsigned char *y)
 {
 	unsigned char *out, *tmp, *tmp_x, *tmp_y;

 	tmp_x = hex_decode(x);
 	tmp_y = hex_decode(y);
 	tmp   = xor_bytes(tmp_x, tmp_y);
 	free(tmp_x);
 	free(tmp_y);

 	out   = hex_encode(tmp);
 	free(tmp);

 	return out;
 }
diff --git a/xor.h b/xor.h
 unsigned char *xor_bytes(const unsigned char *x, const unsigned char *y);
 unsigned char *xor_hex(const unsigned char *x, const unsigned char *y);
	#include <assert.h>
	#include "b64.h"
	#include "hex.h"
	#include "util.h"

	#define INPUT (unsigned char *) \
	"49276d206b696c6c696e6720796f757220627261696e206c" \
	"696b65206120706f69736f6e6f7573206d757368726f6f6d"
	#define OUTPUT (unsigned char *) \
	"SSdtIGtpbGxpbmcgeW91ciBicmFpbiBs" \
	"aWtlIGEgcG9pc29ub3VzIG11c2hyb29t"

	unsigned char *
	hex_to_b64(unsigned char *s)
	{
	unsigned char out, tmp;

	tmp = hex_decode(s);
	out = b64_encode(tmp);
	free(tmp);
	return out;
	}

	int
	main(void)
	{
	assert(!strcmp_unsigned(hex_to_b64(INPUT), OUTPUT));
	return 0;
	}
	#include <assert.h>
	#include "xor.h"
	#include "util.h"

	#define INPUT1 (unsigned char *) "1c0111001f010100061a024b53535009181c"
	#define INPUT2 (unsigned char *) "686974207468652062756c6c277320657965"
	#define OUTPUT (unsigned char *) "746865206b696420646f6e277420706c6179"

	int
	main(void)
	{
	assert(!strcmp_unsigned(xor_hex(INPUT1, INPUT2), OUTPUT));
	return 0;
	}
	#include <assert.h>
	#include <stdio.h>

	#include "hex.h"
	#include "score.h"
	#include "util.h"

	#define INPUT (unsigned char *) \
	"1b37373331363f78151b7f2b783431333d78397828372d363c78373e783a393b3736"
	#define OUTPUT (unsigned char *) \
	"Cooking MC's like a pound of bacon"

	int
	main(void)
	{
	assert(!strcmp_unsigned(OUTPUT, best_xor(hex_decode(INPUT))));
	return 0;
	}
	function getChi2 (str) {
	var english_freq = [
	0.08167, 0.01492, 0.02782, 0.04253, 0.12702, 0.02228, 0.02015, // A-G
	0.06094, 0.06966, 0.00153, 0.00772, 0.04025, 0.02406, 0.06749, // H-N
	0.07507, 0.01929, 0.00095, 0.05987, 0.06327, 0.09056, 0.02758, // O-U
	0.00978, 0.02360, 0.00150, 0.01974, 0.00074 // V-Z
	]
	var count = [], ignored = 0
	for (var i = 0; i < 26; i++) count[i] = 0

	for (var i = 0; i < str.length; i++) {
	var c = str.charCodeAt(i)
	if (c >= 65 && c <= 90) count[c - 65]++; // uppercase A-Z
	else if (c >= 97 && c <= 122) count[c - 97]++; // lowercase a-z
	else if (c >= 32 && c <= 126) ignored++; // numbers and punct.
	else if (c == 9 \|\| c == 10 \|\| c == 13) ignored++; // TAB, CR, LF
	else return Infinity; // not printable ASCII = impossible(?)
	}

	var chi2 = 0, len = str.length - ignored
	for (var i = 0; i < 26; i++) {
	var observed = count[i], expected = len * english_freq[i]
	var difference = observed - expected
	chi2 += difference * difference / expected
	}
	return chi2
	}

	console.log(getChi2('Cooking MCs like a pound of bacon'))
	console.log(getChi2('""&$#*m'))
	console.log(getChi2('��'))
	#include <float.h>
	#include <stdio.h>

	#include <assert.h>
	#include "hex.h"
	#include "score.h"
	#include "util.h"

	#define INPUT "4.txt"
	#define OUTPUT "Now that the party is jumping"

	int
	main(void)
	{
	FILE *fp = fopen(INPUT, "r");
	char *line = NULL;
	unsigned char best = NULL, src, *tmp;
	size_t len, line_size;
	float min = FLT_MAX, score;

	while (!(getline(&line, &line_size, fp) < 0)) {
	src = hex_decode(line);
	tmp = best_xor(src);

	if (!best) {
	best = tmp;
	printf("fuck?\n");
	} else {
	printf("working!\n");
	score = chi2(tmp, strlen_unsigned(src));
	}
	/* printf("%s -- %.2f\n", best, min); */
	}

	/* assert(!strcmp_unsigned(OUTPUT, best_candidate_xor(INPUT))); */
	return 0;
	}
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	#include "b64.h"
	#include "util.h"

	static const unsigned char b64_e[] = {
	'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
	'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
	'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
	'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
	'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
	'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
	'w', 'x', 'y', 'z', '0', '1', '2', '3',
	'4', '5', '6', '7', '8', '9', '+', '/'
	};

	static const unsigned char b64_d[] = {
	['A'] = 0, ['B'] = 1, ['C'] = 2, ['D'] = 3,
	['E'] = 4, ['F'] = 5, ['G'] = 6, ['H'] = 7,
	['I'] = 8, ['J'] = 9, ['K'] = 10, ['L'] = 11,
	['M'] = 12, ['N'] = 13, ['O'] = 14, ['P'] = 15,
	['Q'] = 16, ['R'] = 17, ['S'] = 18, ['T'] = 19,
	['U'] = 20, ['V'] = 21, ['W'] = 22, ['X'] = 23,
	['Y'] = 24, ['Z'] = 25, ['a'] = 26, ['b'] = 27,
	['c'] = 28, ['d'] = 29, ['e'] = 30, ['f'] = 31,
	['g'] = 32, ['h'] = 33, ['i'] = 34, ['j'] = 35,
	['k'] = 36, ['l'] = 37, ['m'] = 38, ['n'] = 39,
	['o'] = 40, ['p'] = 41, ['q'] = 42, ['r'] = 43,
	['s'] = 44, ['t'] = 45, ['u'] = 46, ['v'] = 47,
	['w'] = 48, ['x'] = 49, ['y'] = 50, ['z'] = 51,
	['0'] = 52, ['1'] = 23, ['2'] = 54, ['3'] = 55,
	['4'] = 56, ['5'] = 57, ['6'] = 58, ['7'] = 59,
	['8'] = 60, ['9'] = 61, ['+'] = 62, ['/'] = 63
	};

	unsigned char *
	b64_encode(const unsigned char *s)
	{
	unsigned char out = (unsigned char )malloc(4*strlen_unsigned(s)/3);
	size_t i, j;
	/* unsigned char x, y, z; */

	for (i = 0, j = 0; j < strlen_unsigned(s); j += 3) {
	/* x = str[j++]; */
	/* y = str[j++]; */
	/* z = str[j++]; */

	out[i++] = b64_e[ s[j] >> 2 ];
	out[i++] = b64_e[(077 & s[j] << 4) \| s[j+1] >> 4 ];
	out[i++] = b64_e[(077 & s[j+1] << 2) \| s[j+2] >> 6];
	out[i++] = b64_e[ 077 & s[j+2] ];

	}
	out[i] = '\0';
	return out;
	}
	#include "hex.h"
	#include "util.h"

	static const unsigned char hex_e[] = {
	'0', '1', '2', '3',
	'4', '5', '6', '7',
	'8', '9', 'a', 'b',
	'c', 'd', 'e', 'f',
	};

	static const unsigned char hex_d[] = {
	['0'] = 0, ['1'] = 1, ['2'] = 2, ['3'] = 3,
	['4'] = 4, ['5'] = 5, ['6'] = 6, ['7'] = 7,
	['8'] = 8, ['9'] = 9, ['a'] = 10, ['b'] = 11,
	['c'] = 12, ['d'] = 13, ['e'] = 14, ['f'] = 15,
	};

	unsigned char *
	hex_encode(const unsigned char *s)
	{
	unsigned char out = (unsigned char )malloc(strlen_unsigned(s) * 2 + 1);
	size_t i, j;

	for (i = 0, j = 0; i < strlen_unsigned(s); ++i) {
	out[j++] = hex_e[ (s[i] >> 4) & 0xF ];
	out[j++] = hex_e[ s[i] & 0xF ];
	}
	out[j] = '\0';
	return out;
	}

	unsigned char *
	hex_decode(const unsigned char *s)
	{
	unsigned char out = (unsigned char )malloc((strlen_unsigned(s)/2)+1);
	size_t i, j;

	for (i = 0, j = 0; j < strlen_unsigned(s); ++i, j += 2 )
	out[i] = (hex_d[s[j]] << 4) + hex_d[s[j+1]];
	out[i] = '\0';
	return out;
	}
	unsigned char hex_encode(const unsigned char s);
	unsigned char hex_decode(const unsigned char s);
	CC = cc
	CFLAGS = -std=c99 -Wall -Wextra -Wpedantic

	SRC = b64.c hex.c score.c util.c xor.c
	TST = 01.c 02.c 03.c 04.c
	OBJ = ${SRC:.c=.o}
	EXE = ${TST:.c=}

	all: ${EXE}

	01: ${OBJ} 01.o
	${CC} ${OBJ} [email protected] -o $@

	02: ${OBJ} 02.o
	${CC} ${OBJ} [email protected] -o $@

	03: ${OBJ} 03.o
	${CC} ${OBJ} [email protected] -o $@

	04: ${OBJ} 04.o
	${CC} ${OBJ} [email protected] -o $@

	all: ${OBJ} ${EXE}

	clean:
	rm -f ${OBJ} ${EXE} ${TST:.c=.o}

	.PHONY: all clean