C13131221323331323131323132323213231323131323223313233313232233131323111   >>    C1313122132333132313132313232321323132313132322331323331323223313132311   <<    C13131221323331323131323132323213231323131323223313233313232233131323113   >>      C13131221323331323131323132323213231323131323223313233313232233131323112   >>