D1212111111112331313331313331323113132313232233132313232123313231333132313221   >>    D121211111111233131333131333132311313231323223313231323212331323133313231322   <<    D1212111111112331313331313331323113132313232233132313232123313231333132313223   >>      D1212111111112331313331313331323113132313232233132313232123313231333132313222   >>