D13231123313133313133112323223313231323223313331313231323133313233211   >>    D1323112331313331313311232322331323132322331333131323132313331323321   <<    D13231123313133313133112323223313231323223313331313231323133313233213   >>      D13231123313133313133112323223313231323223313331313231323133313233212   >>