import random
import fractions

def main():
    s = input()
    l = len(s)

    shuffle = lambda x: ''.join(random.sample(x, l))

    se = {int(shuffle(s)) for i in range(100)}

    se = tuple(se)
    ans = int(s)
    for i in range(len(se)):
        ans = fractions.gcd(ans, se[i])
    print(ans)

if __name__ == "__main__":
    main()