从现象认池的毛病

真机上四种现象各对应一种毛病，把现象和毛病配对，打印四个字母：

signs = {
    "结果之和每次不同": "A",
    "程序永远不退出": "B",
    "同时开了几千个线程": "C",
    "结果条数比任务少": "D",
}
fault = {"收结果没加锁": "结果之和每次不同", "没放毒丸/没 shutdown": "程序永远不退出", "没用池、一任务一线程": "同时开了几千个线程", "worker 没存好": "结果条数比任务少"}
print("".join(signs[fault[k]] for k in ("收结果没加锁", "没放毒丸/没 shutdown", "没用池、一任务一线程", "worker 没存好")))