Криптоанализ текста, зашифрованного методом простой замены

<?php
 
$data = <<<D
56 67 92`18 58 39 99 27 87 67 56`25 56 80 67 10 17 92 39 62`25 56`27 24 95 56 31`95 46 27 73 56 31`17 58 39 58 67 95 58`92`56 95 40 24 40 17 92 39 62`69`39 40 17 56 67 58-56 18 99 92 46 67 56 87,69 56`69 39 36`80 17 92 67 27`39 40 87 56 17 58 73 40.25 56 39 73 56 10 17 92,56 43 92 80 40 10,95 56 23 80 40`23 17 40 24 40`25 46 92 69 14 95 67 27 73`95`73 58 87 67 56 73 58.69 39 58`69 56 95 46 27 23`25 46 92 67 10 17 56`38 58 73 95 92 58`56 38 58 46 73 40 67 92 10.25 46 92 18 56 46 56 69`92`25 27 17 62 73 56 69`24 80 58 39 62`18 14 17 56`25 46 58 69 58 17 92 95 56 58`87 67 56 43 58 39 73 69 56,23 17 40 24 40`46 40 24 18 58 23 40 17 92 39 62.56 80 67 40 95 56`18 17 40 23 56 80 40 46 10`73 58 87`43 58 80 69 27 87`67 58 80 58 17 10 87`73 46 58 67 92 46 56 69 56 95`67 40`87 40 95 58 73 58 92`73 14 39 10 38 58 95 46 40 73 67 56 25 56 69 73 56 46 58 67 67 14 87`67 40 39 73 40 69 17 58 67 92 10 87`92 67 39 73 46 27 95 73 56 46 40`56 67 92`39 56 69 58 46 99 58 67 67 56`73 56 38 67 56`24 67 40 17 92,24 40`38 58 87`25 46 92 99 17 92.25 56 67 10 73 92 10`67 58`92 87 58 17 92,80 17 10`38 58 23 56`95 56 67 95 46 58 73 67 56`25 46 58 80 67 40 24 67 40 38 58 67 14`69 39 58`71 73 92`99 73 27 95 92-67 56`56 73`67 92 82`71 73 56 23 56 92`67 58`73 46 58 18 56 69 40 17 56 39 62.
67 58`25 46 56 99 17 56`92`87 92 67 27 73 14,95 40 95`56 67`27 69 92 80 58 17`51 58 17 62`92 82`67 58 17 58 23 95 56 23 56`92`71 95 24 56 73 92 38 58 39 95 56 23 56`25 27 73 58 99 58 39 73 69 92 10-73 46 92`25 27 17 62 73 40`25 56`25 46 40 69 56 87 27`18 56 46 73 27,27 39 14 25 40 67 67 14 58`38 58 46 73 56 69 56 31`27 31 87 56 31`73 27 87 18 17 58 46 56 69,17 40 87 25 56 38 58 95,25 58 46 58 95 17 36 38 40 73 58 17 58 31`92`95 67 56 25 56 95.73 46 92`69 14 25 27 95 17 14 82`71 95 46 40 67 40`69`69 92 80 58`69 58 46 73 92 95 40 17 62 67 14 82`25 46 10 87 56 27 23 56 17 62 67 92 95 56 69-56 67 92`39 40 87 14 58,67 92 95 40 95 56 31`56 99 92 18 95 92…
18 56 80 46 56 39 73 92`46 40 80 92,56 67`25 56 69 73 56 46 92 17`25 46 56`39 58 18 10`25 56 17 36 18 92 69 99 27 36 39 10`51 92 73 40 73 27:“38 73 56`56 80 92 67`38 58 17 56 69 58 95`25 56 39 73 46 56 92 17,80 46 27 23 56 31`24 40 69 39 58 23 80 40`46 40 24 17 56 87 40 73 62`39 87 56 43 58 73”.92,25 56 82 17 56 25 40 69`25 56`25 17 58 38 27 39 73 46 40 99 92 17 27`69`24 67 40 95`73 56 23 56,38 73 56`67 40 25 40 46 67 92 95`80 56 17 43 58 67`18 80 92 73 58 17 62 67 56`39 73 56 10 73 62`67 40`99 27 82 58 46 58,80 56 39 73 40 17`95 92 67 43 40 17`92 24`25 46 92 99 92 73 14 82`67 40 80`95 56 17 58 67 56 87`67 56 43 58 67.
D;
 
preg_match_all('~(\d\d)\s*,~', $data, $m);
$stat = [];
foreach ($m[0] as $v) {
    if (!isset($stat[$v])) $stat[$v] = 0;
    $stat[$v]++;
}
arsort($stat);
print_r($stat);
 
/*
[`92`] => 5
[`69`] => 3
[`95`] => 1
 
[`25 56`] => 3
[`67 58`] => 2
[`67 40`] => 2
[`92 24`] => 1
[`92 82`] => 1
[`56 73`] => 1
[`56 67`] => 1
 
 
*/
 
// 67 67 56 27 67 69 56 
//- 56 12.089201877934
//- 58 8.3333333333333
//- 92 7.3943661971831
//- 67 7.2769953051643
// 73 6.4553990610329
// 40 6.3380281690141
// 17 5.5164319248826
// 46 5.1643192488263
// 95 4.5774647887324
// 25 3.8732394366197
// 69 3.8732394366197
// 39 3.6384976525822
// 27 3.169014084507
// 87 2.6995305164319
// 80 2.5821596244131
// 10 1.9953051643192
// 38 1.7605633802817
// 23 1.7605633802817
// 24 1.6431924882629
// 18 1.6431924882629
// 62 1.5258215962441
// 14 1.5258215962441
// 99 1.4084507042254
// 31 0.93896713615023
// 43 0.82159624413146
// 82 0.82159624413146
// 36 0.46948356807512
// 71 0.46948356807512
// 51 0.23474178403756
 
// 67 56 13
// 25 56 13
// 73 56 13
// 56 69 12
// 67 40 11
// 95 56 11
// 25 46 11
// 58 67 10
// 38 58 10
// 39 73 10
// 17 92 10
// 67 92 10
// 56 67 9
// 56 25 9 -- ложное
// 58 17 9
// 92 67 8
// 46 40 8
// 46 58 8
// 46 92 8
// 40 17 8
// 17 56 8
// 23 56 8
// 17 58 8
// 46 56 7
// 69 56 7
// 58 46 7
// 73 58 7
// 73 46 7
// 56 39 7
 
// [67 56] => 6
// [56 31] => 6
// [39 62] => 5
// [23 56] => 4
// [67 58] => 4
// [56 69] => 4
// [17 92] => 4
// [17 56] => 3
// [14 82] => 3
// [24 40] => 3
// [67 40] => 3
// [92 10] => 3
// [67 92] => 3
// [25 56] => 3
 
$dict = [
    '56' => 'о', // 'а'
    '67' => 'н',
    '92' => 'и',
    '58' => 'е',
    '40' => 'а',
    '73' => 'т',
    '43' => 'ж',
    '39' => 'с',
    '87' => 'м',
    '14' => 'ы',
    '17' => 'л',
    '95' => 'к',
    '69' => 'в',
    '80' => 'д',
    '24' => 'з',
    '25' => 'п',
    '46' => 'р',
    '62' => 'ь',
    '10' => 'я',
    '23' => 'г',
    '27' => 'у',
    '31' => 'й',
    '38' => 'ч',
    '18' => 'б',
    '36' => 'ю',
    '99' => 'ш',
    '71' => 'э',
    '82' => 'х',
    '51' => 'ц',
    ];
 
$data = strtr($data, $dict);
$data = preg_replace('~([а-я])\s+(?=[а-я])~u', '$1', $data);
echo $data;
exit();
 
$letters_stat = [
'о' => 9.28,
'а' => 8.66,
'е' => 8.10,
'и' => 7.45,
'н' => 6.35,
'т' => 6.30,
'р' => 5.53,
'с' => 5.45,
'л' => 4.32,
'в' => 4.19,
'к' => 3.47,
'п' => 3.35,
'м' => 3.29,
'у' => 2.90,
'д' => 2.56,
'я' => 2.22,
'ы' => 2.11,
'ь' => 1.90,
'з' => 1.81,
'б' => 1.51,
'г' => 1.41,
'й' => 1.31,
'ч' => 1.27,
'ю' => 1.03,
'х' => 0.92,
'ж' => 0.78,
'ш' => 0.77,
'ц' => 0.52,
'щ' => 0.49,
'ф' => 0.40,
'э' => 0.17,
'ъ' => 0.04,
];
 
preg_match_all('~\d\d~', $data, $matches);
$encoded = '';
foreach ($matches[0] as $m) {
    $encoded .= chr((int)$m);
}
 
for ($i = 1, $len = strlen($encoded); $i < $len; $i++) {
    $c = $encoded[$i];
    if ($encoded[$i-1] === $c) echo ord($c), " ";
}
echo "\n";
 
$stat = [];
for ($i = 0, $len = strlen($encoded); $i < $len; $i++) {
    $c = $encoded[$i];
    if (!isset($stat[$c])) $stat[$c] = 0;
    $stat[$c]++;
}
 
$stat2 = [];
for ($i = 1, $len = strlen($encoded); $i < $len; $i++) {
    $c = $encoded[$i-1] . $encoded[$i];
    if (!isset($stat2[$c])) $stat2[$c] = 0;
    $stat2[$c]++;
}
 
 
foreach ($stat as $letter => $count) {
    $stat[$letter] = $count / strlen($encoded) * 100;
}
 
// foreach ($stat2 as $letter => $count) {
//  $stat2[$letter] = $count / strlen($encoded) * 100;
// }
 
arsort($stat);
arsort($stat2);
 
foreach ($stat as $k => $v) {
    echo ord($k) . ' ' . $v . "\n";
}
 
echo "\n";
 
foreach ($stat2 as $k => $v) {
    echo ord($k[0]) . ' ' . ord($k[1]) . ' ' . $v . "\n";
}
 
// $codes = array_keys($stat);
// $letters = array_keys($letters_stat);
// $letters = array_slice($letters, 0, sizeof($codes));
 
// $decode_table = array_combine($codes, $letters);
 
// $decoded = '';
// for ($i = 0, $len = strlen($encoded); $i < $len; $i++) {
//  $decoded .= $decode_table[$encoded[$i]];
// }
 
// echo $decoded;