D1212111111112331313331313331323113132313232233132313232123313231333132332211   >>    D121211111111233131333131333132311313231323223313231323212331323133313233221   <<    D1212111111112331313331313331323113132313232233132313232123313231333132332213   >>      D1212111111112331313331313331323113132313232233132313232123313231333132332212   >>