<?php
// Your code here!
$a = explode(".",trim(fgets(STDIN)));
$b = explode(".",trim(fgets(STDIN)));

if($a[0] > $b[0] || $a[0] >= $b[0] && $a[1] > $b[1] || $a[0] >= $b[0] && $a[1] >= $b[1] && $a[2] > $b[2]){
    echo "YES";
} else echo "NO";
?>