import sys
input = sys.stdin.readline
sys.setrecursionlimit(2147483647)
INF=float("inf")
MOD=10**9+7
# A = [ int(input()) for _ in range(N) ]
##############################

S = list(input().rstrip())

ret = {}
def dfs(S, t):
#    print(S, t)

    if S == []:
        ret[t] = True
        return

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

dfs(S, '')
print(len(ret))