S_b = [c for c in input()]
N = int(input())
S_a = [c for c in input()]

if S_b == S_a:
    print('FAILURE')
    exit()

if S_b.count('o') != S_a.count('o'):
    print('SUCCESS')
    exit()

t = 'o'
if S_b.count(t) == 2:
    t = 'x'

if N == 0:
    if S_b != S_a:
        print('SUCCESS')
    else:
        print('FAILURE')
elif N == 1:
    if abs(S_b.index(t) - S_a.index(t)) != 1:
        print('SUCCESS')
    else:
        print('FAILURE')
else:
    if (N - abs(S_b.index(t) - S_a.index(t))) % 2 == 0:
        print('SUCCESS')
    else:
        print('FAILURE')