D1212111111112331313331313331323113132313232233132313232123313132211   >>    D121211111111233131333131333132311313231323223313231323212331313221   <<    D1212111111112331313331313331323113132313232233132313232123313132213   >>      D1212111111112331313331313331323113132313232233132313232123313132212   >>