S = input()
ss = set()


def dfs(s, left, right):
    if right < left:
        if "".join(s) not in ss:
            ss.add("".join(s))
            return 1
        return 0

    s1, s2 = s[:], s[:]
    s1.append(S[left])
    s2.append(S[right])
    res = dfs(s1, left+1, right) + dfs(s2, left, right-1)

    return res


def main():
    ans = dfs([], 0, len(S)-1)
    print(ans)


if __name__ == '__main__':
    main()