fun main( args : Array<String> ) {              
  val (a0, a1, a2) = readLine()!!.split(".").map { it.toInt() }                                  
  val (b0, b1, b2) = readLine()!!.split(".").map { it.toInt() }                                  
  when {                                        
    "%03d%03d%03d".format(a0,a1,a2).toLong() > "%03d%03d%03d".format(b0,b1,b2).toLong()  -> "YES"                                                                                                  
    else -> "NO"                                
  }.let { println(it) } 
}