C12121223131323223313132322331323331323331322221323132313232211   >>    C1212122313132322331313232233132333132333132222132313231323221   <<    C12121223131323223313132322331323331323331322221323132313232213   >>      C12121223131323223313132322331323331323331322221323132313232212   >>