D13231123313133313133112323223313231323223313331313233313232211331   >>    D1323112331313331313311232322331323132322331333131323331323221133   <<    D13231123313133313133112323223313231323223313331313233313232211333   >>      D13231123313133313133112323223313231323223313331313233313232211332   >>