6个数字3个为一组有多少组

简介：He staggered back to his floor, knocked on the door a few times, but there was no response. He cursed in his heart that the yellow-faced woman had gone to play mahjong again and couldn't even sit at home. He was really angry and shook his hands in his pants. He took out a bunch of keys from his pocket. Before he could even twist the key after inserting it, the security door opened automatically with a loud clang.