C21221212121323223313131323132322331323132322112211232313232211   >>    C2122121212132322331313132313232233132313232211221123231323221   <<    C21221212121323223313131323132322331323132322112211232313232213   >>      C21221212121323223313131323132322331323132322112211232313232212   >>