package Yukicoder

/**
 * Created by hichikawa on 2015/11/02.
 */
fun main(args: Array<String>) {
    fun readLineLongArray() : List<Long> {
        val str = readLine() as String
        val arrStr = str.split(" ")
        val ret = arrStr.map { it.toLong() }
        return ret
    }
    fun readLineLong() : Long {
        val str = readLine() as String
        return str.toLong()
    }
    fun readLineStringSorted() : List<Char> {
        val str = readLine() as String
        return str.toCharArray().sorted()
    }
    val inputStr1 = readLineStringSorted()
    val inputStr2 = readLineStringSorted()
    if (inputStr1.equals(inputStr2)) {
        println("YES")
    } else {
        println("NO")
    }
}