D13231123313133313133112323223313231323223313331313231333131232322311   >>    D1323112331313331313311232322331323132322331333131323133313123232231   <<    D13231123313133313133112323223313231323223313331313231333131232322313   >>      D13231123313133313133112323223313231323223313331313231333131232322312   >>