import sys


def input(): return sys.stdin.readline().rstrip('\n')


def main():
    s = input()
    n = int(input())
    t = input()
    if (n == 0 and s != t) or s.count('o') != t.count('o'):
        return 'SUCCESS'

    if s.count('o') in [0, 3]:
        return 'FAILURE'

    targ = 'o' if s.count('o') == 1 else 'x'

    return 'SUCCESS' if (s.find(targ) + t.find(targ) + n) % 2 == 1 else 'FAILURE'


if __name__ == '__main__':
    ret = main()
    if ret is not None:
        print(ret)