C2221333133313331311233132313331333133313232123313331323223313121   >>    C222133313331333131123313231333133313331323212331333132322331312   <<    C2221333133313331311233132313331333133313232123313331323223313123   >>      C2221333133313331311233132313331333133313232123313331323223313122   >>