8. Java end-of-file

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    public static void main(String[] args) {
       Scanner sc=new Scanner(System.in);
       int a = 0;
       while(sc.hasNextLine()){
           String f = sc.nextLine();
           a++;
           System.out.println(a+" "+f);
       }
    }
}