from collections import Counter

def main():
    S = input()

    mask = 0
    n = len(S)
    kaibun = 0
    while mask < (1<<(n-1)):
        i = 0
        s = list(S)
        while i < n - 1:
            if mask & (1<<i):
                s[i] = s[i] + ','
            i += 1
        mask += 1

        text = (''.join(s).split(','))
        i = 0
        j = len(text) - 1
        while j - i > 0:
            if text[i] == text[j]:
                i += 1
                j -= 1
            else:
                break
        else:
            kaibun += 1

    print(kaibun)

main()