solution:

Scanner in = new Scanner(System.in); int lineNumber=1; while (in.hasNextLine()) { String line = in.nextLine(); System.out.println(lineNumber + " " + line); lineNumber++; //

public class Solution {

public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);
    int a = 0;
    String s;
    while(sc.hasNext()){
        s = sc.nextLine();
        a++;
        System.out.println(a+" "+s);
        if(s.endsWith("Read me until end-of-file."))
            break;
    }

     /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
}

}

Scanner sc = new Scanner(System.in); String x = sc.nextLine(); String y = sc.nextLine(); String z = sc.nextLine(); System.out.println("1 "+x); System.out.println("2 "+y); System.out.println("3 "+z);

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 input = new Scanner(System.in);
    int i=1;
    String str;
    while(input.hasNext()){
        str=input.nextLine();
        System.out.println(i+" "+str);
        i++;

    }

}

}

import java.io.; import java.util.;

public class Solution {

public static void main(String[] args) {
    Scanner readObj = new Scanner(System.in);
    int i = 1;
    while(readObj.hasNext()){
        String line = readObj.nextLine();
        System.out.println(i+" "+line);
        i++;
    }
    /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
}

}