# coding:utf-8
from collections import Counter as cC

S_before = input()
N = int(input())
S_after = input()
ans = "FAILURE"

if cC(S_before) != cC(S_after):
    ans = "SUCCESS"
elif N == 0:
    if S_before != S_after:
        ans = "SUCCESS"
elif N == 1:
    if S_after == S_before and S_after[0] == S_after[2] and S_after[0] != S_after[1]:
        ans = "SUCCESS"
    if S_before[1] == S_after[1] and S_after[0] != S_before[0]:
        ans = "SUCCESS"

print(ans)