D13231123313133313133112323223313231323223313331313231333131232313223311   >>    D1323112331313331313311232322331323132322331333131323133313123231322331   <<    D13231123313133313133112323223313231323223313331313231333131232313223313   >>      D13231123313133313133112323223313231323223313331313231333131232313223312   >>