PROGRAMMING:Find the sum of two integers.
Write a program, input two integers from the keyboard, output the sum of the two numbers.
###Input format:
There are several groups of test data, which are processed to the end of the file. Input 2 integers a and B in the same line for each group of test data.
###Output format:
Each group outputs the sum of a + B
###Input example:
Here is a set of inputs. For example:
```in
9 15
```
###Output example:
The corresponding output is given here. For example:
```out
twenty-four
```
answer：If there is no answer, please comment
###Input format:
There are several groups of test data, which are processed to the end of the file. Input 2 integers a and B in the same line for each group of test data.
###Output format:
Each group outputs the sum of a + B
###Input example:
Here is a set of inputs. For example:
```in
9 15
```
###Output example:
The corresponding output is given here. For example:
```out
twenty-four
```
answer：If there is no answer, please comment