254期后三杀三和尾:0,6,7253期后三杀三和尾:1,7,8中252期后三杀三和尾:2,6,7中251期后三杀三和尾:1,4,6中250期后三杀三和尾:2,5,6中249期后三杀三和尾:2,6,7错