D1212121221323132313232332313232233132313233313331313231333132322121   >>    D121212122132313231323233231323223313231323331333131323133313232212   <<    D1212121221323132313232332313232233132313233313331313231333132322123   >>      D1212121221323132313232332313232233132313233313331313231333132322122   >>