import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

import random

S = list(readline().rstrip())
N = int(readline())
T = list(readline().rstrip())

if N > 4:
    N = 4

answer = 'SUCCESS'
for _ in range(1000):
    A = S[:]
    for _ in range(N):
        i = random.randint(0,1)
        A[i], A[i+1] = A[i+1], A[i]
    if A==T:
        answer = 'FAILURE'
        break

print(answer)