def possible(s, t, n):
    if s.count('o') != t.count('o'):
        return False

    if s.count('o') > 1:
        s = s.translate(str.maketrans('ox', 'xo'))
        t = t.translate(str.maketrans('ox', 'xo'))

    if s.count('o') == 0:
        return s == t

    # s.count('o') == 1
    if n == 1:
        return not (s[1] == t[1] == 'o' or s == t[::-1])
    else:
        return True

s = input()
n = int(input())
t = input()
print('FAILURE' if possible(s, t, n) else 'SUCCESS')