D13231123313133313133112323223313231323223313331313231333132212131   >>    D1323112331313331313311232322331323132322331333131323133313221213   <<    D13231123313133313133112323223313231323223313331313231333132212133   >>      D13231123313133313133112323223313231323223313331313231333132212132   >>