C2221333133313331311233132313331333133313232123313331323223313232121   >>    C222133313331333131123313231333133313331323212331333132322331323212   <<    C2221333133313331311233132313331333133313232123313331323223313232123   >>      C2221333133313331311233132313331333133313232123313331323223313232122   >>