<?php
$fossilVer = trim(fgets(STDIN));
$target = trim(fgets(STDIN));

$X = new something($target);

$X->comparVer($fossilVer, $target);

if($X->status == 'OLD'){
	echo 'YES';
}else if($X->status == 'NEW'){
	echo 'NO';
}


class something{
	public $version;
	public $status;
	
	function __construct($target){
		$this->version = $target;
	}
	
	function comparVer($fossil, $tar){
		$fos = explode('.', $fossil);
		$t = explode('.', $tar);
		
		if(!(count($fos) == count($t))){
			die("ERROR!");
		}else{
			$roop = count($fos);
		}
		
		for($i = 0; $i < $roop; $i++){
			if($fos[$i] >= $t[$i]){
				continue;
			}else{
				$this->status = 'NEW';
				return;
			}
		}
		
		$this->status = 'OLD';
	}
}