for a11 in range(2):
    for a12 in range(2):
        for a13 in range(2):
            for a21 in range(2):
                for a22 in range(2):
                    for a23 in range(2):
                        for a31 in range(2):
                            for a32 in range(2):
                                for a33 in range(2):
                                    if a11 == 0 and (a12 == 0 and a21 == 0) or a11 == 1 and not (a12 == 0 and a21 == 0):
                                        continue