fun main() {
    val builder = StringBuilder()

    val cnt = mutableMapOf<Char, Int>()

    val s = readInputLine()

    s.forEach {
        cnt[it] = (cnt[it] ?: 0) + 1
    }

    var ans = 1

    for (i in 1..s.length) {
        ans *= i
    }

    for ((c, ccnt) in cnt) {
        for (i in 1..ccnt) {
            ans /= i
        }
    }

    builder.appendln(ans - 1)

    print(builder.toString())
}

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