<?php
while ($line = fgets(STDIN)) {
	$s[] = trim($line);
}
foreach ($s as $key => $value) {
	$array[] = explode(" ", $value);
}
$lines = array_splice($array, 0, 1);

$counter = 0;
for ($i=0; $i<$lines[0][0]; $i++) {
    if (strpos($array[$i][0], "LOVE") !== false) {
        echo "YES".PHP_EOL;
        $counter++;
        break;
    }
}

if ($counter == 0) {
    echo "NO".PHP_EOL;
}
?>