# 2915. A+B(III)

### 输入格式

Input contains multiple test cases. Each test case contains a pair of integers a and b, one pair of integers per line. A test case containing 0 0 terminates the input and this test case is not to be processed.

### 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

Input
1 5
10 20
0 0

Output
6
30


371 人解决，394 人已尝试。

408 份提交通过，共有 635 份提交。

0.9 EMB 奖励。