PROGRAMMING:A + B input output exercise (VII)

My friends have gone again, and now you are the only one to take sugar with your hands.
###Input format:
Each line has two integers a and B, representing the amount of sugar in your left and right hands.
###Output format:
Each row outputs the result of a + B, and each row takes up one row. There is an empty row after the result.
###Input example:
Here is a set of inputs. For example:
```in
1 5
10 20
```
###Output example:
The corresponding output is given here. For example:
```out
six
thirty
```







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