fscanf(STDIN, "%d",
    $L
);
fscanf(STDIN, "%d",
    $H
);
$T = stream_get_line(STDIN, 256 + 1, "\n");
$T = str_split(strtoupper($T));

for ($i = 0; $i < $H; $i++)
{

    $ROW = stream_get_line(STDIN, 1024 + 1, "\n");
    foreach($T as $letter) {
        $abc = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ?';
        $positionOfLetter = strpos($abc, $letter);

        if($positionOfLetter === false) {
            $positionOfLetter = strlen($abc) - 1;
        }
        echo substr($ROW, $positionOfLetter*$L, $L);
    }
    echo "\n";
}