C3121113331313231323132333131313231323131323223313233313233313232233123111   >>    C312111333131323132313233313131323132313132322331323331323331323223312311   <<    C3121113331313231323132333131313231323131323223313233313233313232233123113   >>      C3121113331313231323132333131313231323131323223313233313233313232233123112   >>