D13231123313133313133112323223313231323223313331313231323133313232121   >>    D1323112331313331313311232322331323132322331333131323132313331323212   <<    D13231123313133313133112323223313231323223313331313231323133313232123   >>      D13231123313133313133112323223313231323223313331313231323133313232122   >>