2p q

2p q2p q2p q2p q
2p q2p q2p q2p q2p q2p q2p q2p q
2p q2p q2p q2p q2p q2p q2p q2p q2p q2p q2p q2p q
2p q2p q2p q2p q2p q2p q2p q2p q2p q2p q2p q2p q2p q2p q2p q2p q
2p q2p q2p q2p q2p q2p q2p q2p q