S0 = input()
N = int(input())
S1 = input()
C0 = {"o":0,"x":0}
C0["o"] = S0.count("o")
C0["x"] = S0.count("x")
C1 = {"o":0,"x":0}
C1["o"] = S1.count("o")
C1["x"] = S1.count("x")
if C0["o"]!=C1["o"]:
    print("SUCCESS")
elif C0["o"]==3 or C0["x"]==3:
    print("FAILURE")
elif S0==S1:
    if S0=="oxo" or S0=="xox":
        if N%2==0:
            print("FAILURE")
        else:
            print("SUCCESS")
    else:
        print("FAILURE")
else:
    ind = 0
    for i in range(3):
        if S0[i]==S1[i]:
            ind = i
            break
    if ind==0 or ind==2:
        if N>=1:
            print("FAILURE")
        else:
            print("SUCCESS")
    else:
        if N>=2:
            print("FAILURE")
        else:
            print("SUCCESS")