C11111333133313232233133313331333133313233213331323221131211111   >>    C1111133313331323223313331333133313331323321333132322113121111   <<    C11111333133313232233133313331333133313233213331323221131211113   >>      C11111333133313232233133313331333133313233213331323221131211112   >>