C :

#include <stdio.h>

int main()
{
	int a,b;

	while(scanf("%d%d",&a,&b)!=EOF)
		printf("%d\n",a+b);
	
	return 0;
}

C++ :

#include <iostream>
using namespace std;

int main()
{
	int a,b;

	while(cin>>a>>b)
		cout<<a+b<<endl;
	
	return 0;
}

Pascal :

program p1001(Input,Output); 
var 
  a,b:Integer; 
begin 
   while not eof(Input) do 
     begin 
       Readln(a,b); 
       Writeln(a+b); 
     end; 
end.

Java :

import java.util.Scanner;

public class Main 
{
	public static void main(String[] args) 
	{
		Scanner sc = new Scanner(System.in);

		while(sc.hasNextInt())
		{
			int a = sc.nextInt();
			int b = sc.nextInt();
			System.out.println(a+b);
		}
	}
}

Python :

import sys
for line in sys.stdin:
    a = line.split()
    print int(a[0]) + int(a[1])