def tezina(Sbef, N, Saft):
    o_bef = Sbef.count('o')
    o_aft = Saft.count('o')
    if o_bef != o_aft:
        return 'SUCCESS'
    else:
        if (o_bef == 1) or (o_bef == 2):
            if N == 1:
                if (Sbef == Saft) or (Saft == 'xox'):
                    return 'FAILURE'
                else:
                    return 'SUCCESS'
            else:
                return 'FAILURE'
        elif (o_bef == 0) or (o_bef == 3):
            return 'FAILURE'

def main():
    Sbef = input()
    N = int(input())
    Saft = input()
    print(tezina(Sbef, N, Saft))

if __name__ == '__main__':
    main()