C11111333133313232233133313331333133313233213331323133313233311232332111   >>    C1111133313331323223313331333133313331323321333132313331323331123233211   <<    C11111333133313232233133313331333133313233213331323133313233311232332113   >>      C11111333133313232233133313331333133313233213331323133313233311232332112   >>