import sys

sys.setrecursionlimit(10 ** 6)
int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def MI(): return map(int, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]

def main():
    def dfs(i,j,t=""):
        if i+1==j:
            ans.add(t)
            return
        dfs(i+1,j,t+s[i+1])
        dfs(i,j-1,t+s[j-1])

    s = input()
    n=len(s)
    ans=set()
    dfs(-1,n)
    print(len(ans))

main()