四种收不到各是什么

把四种现象和它们在 ss / 报错里的样子配对：

signs = {
    "端口上没人听": "A",
    "绑在别的地址": "B",
    "起不来报占用": "C",
    "客户端永远等": "D",
}
clues = {"ss 里没有那个端口": "端口上没人听", "ss 里是 127.0.0.5:端口": "绑在别的地址", "Address already in use": "起不来报占用", "没有 settimeout": "客户端永远等"}
print("".join(signs[clues[k]] for k in ("ss 里没有那个端口", "ss 里是 127.0.0.5:端口", "Address already in use", "没有 settimeout")))