import java.util.*

fun main(args: Array<String>) {

    val cin = Scanner(System.`in`)
    val a:String = cin.next()
    val b:String = cin.next()
	
    if(anagramCheck(a,b))
        println("YES")
    else
        println("NO")
}

fun anagramCheck(a:String, _b:String) :Boolean {
    var b = StringBuilder(_b)
    if (a.length != b.length) {
        return false
    } else {
        for (c in a) {
            val result:Int = b.indexOf(c)
            if (result >= 0) 
            b.deleteCharAt(result)
        }
    }
    return b.length == 0
}