import sys


def input(): return sys.stdin.readline().rstrip()


def main():
    s = input()
    ans = set()

    def bktk(c, r):
        if r == '':
            ans.add(c)
        else:
            bktk(c + r[-1], r[:-1])
            bktk(c + r[0], r[1:])

    bktk('', s)
    print(len(ans))


if __name__ == '__main__':
    main()