import math
S = input()
l = list(S)
ld = []
l.sort()
print(l)
ck = l[0]
count = 0
for l_i in l:
    if ck == l_i:
        count += 1
    else:
        ld.append(count)
        count = 1
    ck = l_i

ld.append(count)

mom = 1
for l_i in ld:
    mom *= math.factorial(l_i)

ans = math.factorial(len(l)) // mom
    
print(ans - 1)