b = input()
n = int(input())
a = input()
ans = "FAILURE"

if b.count("o") != a.count("o"):
    ans = "SUCCESS"

elif n == 0:
    if b != a:
        ans = "SUCCESS"

elif n == 1:
    if b == a == "oxo" or b == a =="xox":
        ans = "SUCCESS"

print(ans)