题解 | #配置文件恢复#

dic = {'reset':'reset what', 'reset board':'board fault', 'board add':'where to add', 'board delete':'no board at all', 'reboot backplane':'impossible', 'backplane abort':'install first'}
dic_k = [['reset','board'],['board','add'],['board','delete'],['reboot','backplane'],['backplane','abort']]

while True:
    try:
        ent = list(input().split())
        if len(ent) == 1:
            if ent[0] == 'reset'[:len(ent[0])]:
                print(dic['reset'])
            else:
                print('unknown command')
        elif len(ent) == 2:
            st = ''
            key = []
            for i in dic_k:
                if ent[0] == i[0][:len(ent[0])] and ent[1] == i[1][:len(ent[1])]:
                    st = i[0] + ' ' + i[1]
                    key.append(st)
            
            if len(key) == 1:
                print(dic[key[0]])
            else:
                print('unknown command')
        
        else:
            print('unknown command')

    except:
        break