C13131221323331323131323132323213231323131323223313233313232233132312111   >>    C1313122132333132313132313232321323132313132322331323331323223313231211   <<    C13131221323331323131323132323213231323131323223313233313232233132312113   >>      C13131221323331323131323132323213231323131323223313233313232233132312112   >>