zju Problem 1001: A + B Problem

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 <stdio.h>

int main()
}

Summary:
The Online Judge Platform may have got a background file-input system which makes the loop terminal condition EOF.