fun main() {
    val builder = StringBuilder()

    val aCnt = IntArray('z' - 'a' + 1)
    val bCnt = IntArray('z' - 'a' + 1)

    readInputLine().forEach {
        aCnt[it - 'a']++
    }

    readInputLine().forEach {
        bCnt[it - 'a']++
    }

    builder.appendln(if ((0..('z' - 'a')).all { aCnt[it] == bCnt[it] }) "YES" else "NO")

    print(builder.toString())
}

fun readInputLine(): String {
    return readLine()!!
}