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                                        Problem M
Two-sum
                                                                                    
  Per-Magnus is trying to add two integers, but he never learned how to.
Write a program to help him with this most difficult task!
Input
The input consists of a single line with two integers $0 \le a \le 1\, 000$ and $0 \le b \le 1\, 000$.
Output
Output a single integer, the sum $a + b$.
| Sample Input 1 | Sample Output 1 | 
|---|---|
| 1 1 | 2 | 
| Sample Input 2 | Sample Output 2 | 
|---|---|
| 2 2 | 4 | 
