C12121223131323223313132322331323132333132332132313231311211311   >>    C1212122313132322331313232233132313233313233213231323131121131   <<    C12121223131323223313132322331323132333132332132313231311211313   >>      C12121223131323223313132322331323132333132332132313231311211312   >>