# import sys; input = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")
import itertools

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	S = list(input())
	D = defaultdict(int)
	P = list(itertools.permutations(S, len(S)))
	for i in range(len(P)):
		D["".join(P[i])] += 1

	# print(D)
	print(len(D) - 1)



if __name__ == '__main__':
	main()