C13131221323331323131323132323213231323131323223313233313232311311   >>    C1313122132333132313132313232321323132313132322331323331323231131   <<    C13131221323331323131323132323213231323131323223313233313232311313   >>      C13131221323331323131323132323213231323131323223313233313232311312   >>