123321

import java.io.*;
import java.util.Random;
public class exe{
    public int cow;
    public int bull;
    public Process proc;
    BufferedReader stdInput;
    BufferedReader stdError;
    OutputStream stdIn;
    Runtime rt ;
    int FLAG;
    public void init(){
        FLAG = 0;
        try{
            String strOut = null;
            rt=Runtime.getRuntime();
            String[] commands = {"E:\\Doc\\nmap-7.40\\ncat.exe","bullandcow-challenge.framgia.vn","2015"};
            proc = rt.exec(commands);

            stdInput = new BufferedReader(new
                InputStreamReader(proc.getInputStream()));
            stdError = new BufferedReader(new
                InputStreamReader(proc.getErrorStream()));

            stdIn = proc.getOutputStream();
            for (int i=1;i<=10;++i)
            {
                strOut = stdInput.readLine();
                System.out.println(strOut);
            }
        } catch (IOException ex){}
    }
    public void getBullCow(String input){
        //Count Bull

        String str = input;
        String findStr = "bull";
        int lastIndex = 0;
        int count = 0;

        while(lastIndex != -1){

            lastIndex = str.indexOf(findStr,lastIndex);

            if(lastIndex != -1){
                count ++;
                lastIndex += findStr.length();
            }
        }
        bull=count;

        //Count Cow

        findStr = "cow";
        lastIndex = 0;
        count = 0;

        while(lastIndex != -1){

            lastIndex = str.indexOf(findStr,lastIndex);

            if(lastIndex != -1){
                count ++;
                lastIndex += findStr.length();
            }
        }
        cow=count;


        findStr = "nothing";
        lastIndex = 0;
        count = 0;

        while(lastIndex != -1){

            lastIndex = str.indexOf(findStr,lastIndex);

            if(lastIndex != -1){
                count ++;
                lastIndex += findStr.length();
            }
        }

        String strOut=null;
        if ((cow==0 && bull==0 && count ==0) || (bull==4)){
            try{
            while ((strOut = stdInput.readLine())!=null)
            {

                System.out.println(strOut);
                FLAG=1;
                Thread.sleep(10000000);

            }
            } catch (Exception ex){}
        }

        System.out.println("Bull:"+bull + '\n'+"Cow:"+cow);


    }
    public String send(String num){
        String strOut = null,strTemp=null;
        try{
            num+='\n';
            stdIn.write(num.getBytes ("US-ASCII"));
            stdIn.flush();
            strOut = stdInput.readLine();
            System.out.println(strOut);
            strTemp = stdInput.readLine();
            //System.out.println(strOut);
        } catch( IOException ex) {}
        System.out.println(num);
        String bullCowStr=strOut.substring(36);
        getBullCow(bullCowStr);

        return strOut;

    }

    String buf;
    String list;
    static int n=4;

    public void clear(){
        stdInput=null;
        stdError=null;
        stdIn=null;
        rt =null;
    }

    public void game(){


    }


    public static void main(String[] args){

        exe CTF=new exe();
        CTF.init();
        CTF.send("1234");//return string là kết quả đồng thời tự thay đổi số cow, bull luôn


    }
}