题解 | #配置文件恢复#

while True:
    try:
        s = input().split()
        if len(s) == 1 and s != '':
            if s[0] == 'reset'[0:len(s[0])]:
                print('reset what')
            else:
                print('unknown command')
        elif len(s) == 2:
            if s[0] == 'reset'[0:len(s[0])] and s[1] == 'board'[0:len(s[1])]:
                print('board fault')
            elif s[0] == 'board'[0:len(s[0])] and s[1] == 'add'[0:len(s[1])]:
                print('where to add')
            elif s[0] == 'board'[0:len(s[0])] and s[1] == 'delete'[0:len(s[1])]:
                print('no board at all')
            elif s[0] == 'reboot'[0:len(s[0])] and s[1] == 'backplane'[0:len(s[1])]:
                print('impossible')
            elif s[0] == 'backplane'[0:len(s[0])] and s[1] == 'abort'[0:len(s[1])]:
                print('install first')
            else:
                print('unknown command')
    except:
        break