D1212111111112331313331313331323113132313232233132313232123313232213231   >>    D121211111111233131333131333132311313231323223313231323212331323221323   <<    D1212111111112331313331313331323113132313232233132313232123313232213233   >>      D1212111111112331313331313331323113132313232233132313232123313232213232   >>