①点O的“距离坐标”为（0，0）；

②在直线CD上，且到直线AB的距离为p（p＞0）的点的“距离坐标”为（p，0）；在直线AB上，且到直线CD的距离为q（q＞0）的点的“距离坐标”为（0，q）；

③到直线AB、CD的距离分别为p，q（p＞0，q＞0）的点的“距离坐标”为（p，q）．

设M为此平面上的点，其“距离坐标”为（m，n），根据上述对点的“距离坐标”的规定，解决下列问题：

设实数a，b，c满足a+b+c=6，则a，b，c中（　　）

   Jack went to a barber’s shop and had his hair cut, but when he came out, he was not  h____  with the result. When his friend Bob saw him, he  l____  and said, “What happened to your hair, Jack?”
   Jack said, “I tried a new barber’s shop today, because I wasn’t quite satisfied with the  o____  one, but this one seems even w____ .”
   Bob agreed. “Yes. I think you are right, Jack. Now I’ll tell you  w____  to do when you go into a barber’s shop  n____  time. Look at the barber’s hair, find out whose hair  l____  worst, and then go straight to him.”
   “Why shall I go to him?” Jack asked, “But that would be foolish.”
   “Oh, no, it wouldn’t.” said Bob. “Who cut that man’s  h____ ? Just think it over. He couldn’t cut it   h____ , could he? One of the  o____  barbers cut it. So you know he can’t be the worst barber.”