D13231123313133313133112323223313231323223313331313231323132312121221   >>    D1323112331313331313311232322331323132322331333131323132313231212122   <<    D13231123313133313133112323223313231323223313331313231323132312121223   >>      D13231123313133313133112323223313231323223313331313231323132312121222   >>