S1 = input()
N = int(input())
S2 = input()

def prt(x):
    if x == 0:
        print("FAILURE")
    else:
        print("SUCCESS")
    exit()

if S1.count("o") != S2.count("o"):
    prt(1)
if S1.count("o") == 0 and S2.count("o") == 0:
    prt(0)
if S1.count("x") == 0 and S2.count("x") == 0:
    prt(0)
if N == 0:
    if S1 == S2:
        prt(0)
    else:
        prt(1)

X1 = int(S1.replace("x","0").replace("o","1"),2)
X2 = int(S2.replace("x","0").replace("o","1"),2)
if X1 in [3,5,6]:
    X1 = 7 - X1
    X2 = 7 - X2
if X1 == 4:
    X1 = 1
if X2 == 4:
    X2 = 1
if (X1 == X2) ^ (N % 2 == 0):
    prt(1)
else:
    prt(0)