D13231123313133313133112323223313233313231322132313331323211211   >>    D1323112331313331313311232322331323331323132213231333132321121   <<    D13231123313133313133112323223313233313231322132313331323211213   >>      D13231123313133313133112323223313233313231322132313331323211212   >>