//package t0817;

import java.util.*;

public class FileRelive {//类名换成Main

    public static void main(String[] args){

      // System.out.println("请按要求输入一组指令，换行输入：");

        Scanner Src= new Scanner(System.in);

        Vector<String> vec=new Vector<String>();

        int count=0;

        String str = "";

        while(Src.hasNextLine()){

            str=Src.nextLine();

            if(str.equals(""))break;

            vec.add(str);      // 入队

            count++;

        }

        for(int i=0;i<count;i++){

            System.out.println(FileLiveExe(vec.elementAt(i)));

        }

    }

    static String[] commands = {"reset","reset board","board add","board delet","reboot backplane","backplane abort"};

    static String[] result = {"reset what","board fault","where to add","no board at all","impossible","install first"};

    public static String FileLiveExe(String str1){

        String strout="";

        String str2[]=str1.split(" ");  //空格分开的

        if(str2.length==1){              //长度为1时

            if(commands[0].startsWith(str2[0]))   //匹配第一个命令

               strout=result[0] ;

             else {

                  for(int i=1;i<commands.length;i++){  //匹配后面几个命令

                      if(commands[i].startsWith(str1)){

                          strout="unkown command";

                          break;

                      }

                  }

                  if(strout=="")                 // 都不匹配

                      strout="unkown command";

                 }

        }else if(str2.length==2){

            int flag=0;    //找到啊标志位

            int index=-1;  //保存命令行数

            for(int j=1;j<commands.length;j++){

                String temp[]=commands[j].split(" ");//空格先分隔一下命令

                if(temp[0].startsWith(str2[0]) && temp[1].startsWith(str2[1])){ //如果两个分别匹配

                    index=j;

                    flag++;

                }

            }

            if(flag==1) {strout=result[index];}  //赋值

            else strout="unkown command";

        }else{

            strout="unkown command";

        }

        return strout;

    }

}