D1212111111112331313331313331323113132313232233132313232123313232213231323311   >>    D121211111111233131333131333132311313231323223313231323212331323221323132331   <<    D1212111111112331313331313331323113132313232233132313232123313232213231323313   >>      D1212111111112331313331313331323113132313232233132313232123313232213231323312   >>