题解 | #配置文件恢复#

import re

dic = {
    ("reset", "board"): "board fault",
    ("board", "add"): "where to add",
    ("board", "delete"): "no board at all",
    ("reboot", "backplane"): "impossible",
    ("backplane", "abort"): "install first",
}
keys = dic.keys()
while True:
    try:
        l = input().split()
        if len(l) == 1:
            if re.match(l[0], "reset"):
                print("reset what")
            else:
                print("unknown command")
        elif len(l) == 2:
            count = 0
            ml = ""
            for x in keys:
                if re.match(l[0], x[0]) and re.match(l[1], x[1]):
                    count += 1
                    ml = dic[x]
            if count == 1:
                print(ml)
            else:
                print("unknown command")
    except:
        break