<?php

$timers = explode(',', file_get_contents('./input.txt'));

echo sprintf('Initial state: %s', implode(',', $timers));

for ($i = 0; $i < 80; $i++) {
    for($t = 0, $l = count($timers); $t < $l; $t++) {
        if ($timers[$t] > 0) {
            $timers[$t]--;
        } else {
            $timers[$t] = 6;
            $timers[] = 8;
        }
    }
    echo sprintf('After %u day(s): %s%s', $i + 1, implode(',',$timers), "\n");
}

echo count($timers);