C2221333133313331311233132313331333133313331333133313231333132212121   >>    C222133313331333131123313231333133313331333133313331323133313221212   <<    C2221333133313331311233132313331333133313331333133313231333132212123   >>      C2221333133313331311233132313331333133313331333133313231333132212122   >>