def f(x):
    if x == "o":
        return 1
    else:
        return 0

S = list(input())
N = int(input())
T = list(input())
S = list(map(f, S))
T = list(map(f, T))
if S.count(1) != T.count(1):
    print("SUCCESS")
    exit()
if S == T:
    print("FAILURE")
    exit()
ans = [abs(S[i] - T[i]) for i in range(3)]
if ans == [1, 0, 1]:
    if N >= 2:
        print("FAILURE")
    else:
        print("SUCCESS")
else:
    if N >= 1:
        print("FAILURE")
    else:
        print("SUCCESS")