题目描述

Calculate a + b

输入格式

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

输出格式

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.

样例

样例 1

输入：

1 5

输出：

6

提示

Use + operator