SB = input()
N = int(input())
SA = input()

if SB.count("x") != SA.count("x"):
    print("SUCCESS")
    exit()
if N == 0 and SB != SA:
    print("SUCCESS")
    exit()
if N == 2:
    print("FAILURE")
    exit()
if N == 1:
    count = 0
    for i in range(2):
        if SB[i:i+2] != SA[i:i+2]:
            count += 1
        if count == 2:
            print("SUCCESS")
            exit()
print("FAILURE")