D13231123313133313133112323223313231323223313331313231333132312221   >>    D1323112331313331313311232322331323132322331333131323133313231222   <<    D13231123313133313133112323223313231323223313331313231333132312223   >>      D13231123313133313133112323223313231323223313331313231333132312222   >>