C13131221323331323131323132323213231323131323223313233313132333132322123111   >>    C1313122132333132313132313232321323132313132322331323331313233313232212311   <<    C13131221323331323131323132323213231323131323223313233313132333132322123113   >>      C13131221323331323131323132323213231323131323223313233313132333132322123112   >>