from collections import deque
S = list(input())

ans = set()
def f(S: list, S2: list):
    if not S:
        ans.add("".join(S2))
        return
    S2.append(S[0])
    f(S[1:], S2)
    S2.pop()
    S2.append(S[-1])
    f(S[:-1], S2)
    S2.pop()

f(S, [])
print(len(ans))