import java.util.*;
class StringGenerator extends Thread
{

    char c[]=new char[5];
    char a,b;
    long id;
    boolean signal=true;
    public StringGenerator(char a,char b)
    {

        this.a=a;this.b=b;
        start();

    }
    public void run()
    {
        id = Thread.currentThread().getId();
        while(signal)
        {
            Random rnd = new Random();
            for(int i=0;i<5;i++)
            {
            c[i]= (char) (rnd.nextInt(((int)b - (int) a) +1) + (int)'A');
            }
            System.out.println("nit " + id);
            String s = "";
            for(int i=0;i<5;i++) s+= c[i];
            System.out.print(s);
            System.out.println();
            try{
            Thread.sleep(1000);
            }catch(InterruptedException n){}
        }
        System.out.println("Nit je zaustavljena");
    }
    public void zaustavi(){
        signal=false;
    }
    public static void main(String args[])
    {
        StringGenerator n1=new StringGenerator('A','Z');
        StringGenerator n2=new StringGenerator('M','N');
        StringGenerator n3=new StringGenerator('A','z');
        StringGenerator n4=new StringGenerator('B','F');
        try{
                    Thread.sleep(25000);
            }catch(InterruptedException a){}
            n1.zaustavi();
            n2.zaustavi();
            n3.zaustavi();
            n4.zaustavi();
    }
}