S = input()
n = len(S)

d = {}

def solve(S,T):
    if len(T) == n:
        d[T] = 1
        return
    tmp1 = T+S[0]
    tmp2 = T+S[-1]
    solve(S[1:],tmp1)
    solve(S[:len(S)-1],tmp2)
    
solve(S,"")
print(len(d.keys()))