S = raw_input()
ans = set()

def dfs(left, right, tmp=""):
    if (left > right):
        ans.add(tmp)
        return
    global S
    dfs(left + 1, right, tmp + S[left])
    dfs(left, right - 1, tmp + S[right])

dfs(0, len(S) - 1)
print len(ans)