??????????????????????????????????????????????????R?G????G?RR??G???????BRRRG??????BRRRG???RRR???GGRRRRR???GRRR???????RR?????????GR????GR?RG????GRGG??GGGR?GG?GGGGG??GGGGGGGGGGGGGGGGGG?GGGG??GGGGG????????G?????????????????????