Calculate a + b

Input

The input will consist of a series of pairs of integers a and b,separated by a space, one pair of integers per line.

Output

For each pair of input integers a and b you should output the sum of a and b in one line,and with one line of output for each line in input.

Sample Input

1 5

Sample Output

6

Hint

Use + operator

   

#include<iostream>

using namespace std;

int main(){

    int a,b;

    while(cin>>a>>b||(a&&b))

        cout<<a+b<<endl;

    retrun 0;

}