D1212111111112331313331313331323113132313232233132313232332322123111   >>    D121211111111233131333131333132311313231323223313231323233232212311   <<    D1212111111112331313331313331323113132313232233132313232332322123113   >>      D1212111111112331313331313331323113132313232233132313232332322123112   >>