<commit_before><?php
$pairs = [];
$buffer = [];

fgets(STDIN);
while ($w = chop(fgets(STDIN))) {
    $r = strrev($w);
    if (array_key_exists($r, $buffer)) {
        if (--$buffer[$r] == 0) {
            unset($buffer[$r]);
        }
        $pairs[] = min($w, $r);
    } else {
        if (!array_key_exists($w, $buffer)) {
            $buffer[$w] = 0;
        }
        ++$buffer[$w];
    }
}

sort($pairs);
$upper = implode($pairs);
$lower = strrev($upper);

$center = '';
foreach ($buffer as $w => $c) {<commit_msg>変数の初期化を省略<commit_after><?php
fgets(STDIN);
while ($w = chop(fgets(STDIN))) {
    $r = strrev($w);
    if (array_key_exists($r, $buffer)) {
        if (--$buffer[$r] == 0) {
            unset($buffer[$r]);
        }
        $pairs[] = min($w, $r);
    } else {
        ++$buffer[$w];
    }
}

sort($pairs);
$upper = implode($pairs);
$lower = strrev($upper);

foreach ($buffer as $w => $c) {
{'fraction_non_alphanumeric': 0.24312431243124313, 'fraction_numerical': 0.0033003300330033004, 'mean_word_length': 2.4600760456273765, 'pattern_counts': {'":': 0, '<': 5, '<?xml version=': 0, '>': 5, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '5905301', 'n_tokens_mistral': 366, 'n_tokens_neox': 364, 'n_words': 66}