def main():
    b, n, a = input(), int(input()), input()

    b_lst, a_lst = [], []
    b_lst2, a_lst2 = [], []
    for i in range(3):
        if b[i] == "o":
            b_lst.append(i)
        else:
            b_lst2.append(i)
        if a[i] == "o":
            a_lst.append(i)
        else:
            a_lst2.append(i)

    if len(b_lst) != len(a_lst):
        print("SUCCESS")
    else:
        if len(b_lst) == 1 and (b_lst[0]-a_lst[0]) % 2 != n % 2:
            print("SUCCESS")
        elif len(b_lst) == 2 and (b_lst2[0]-a_lst2[0]) % 2 != n % 2:
            print("SUCCESS")
        else:
            print("FAILURE")


if __name__ == '__main__':
    main()