st = set()


def main():
    S = input()
    T = ""
    dfs(S, T)
    print(len(st))


def dfs(S, T):
    if not S:
        st.add(T)
        return

    dfs(S[1:], T + S[0])
    dfs(S[:len(S) - 1], T + S[-1])


if __name__ == '__main__':
    main()