C13131221323331323131323132323213231323131323223313233313231313223111   >>    C1313122132333132313132313232321323132313132322331323331323131322311   <<    C13131221323331323131323132323213231323131323223313233313231313223113   >>      C13131221323331323131323132323213231323131323223313233313231313223112   >>