PROGRAMMING:Touch table tennis
There are a white table tennis ball and B red table tennis ball in the box. You don't need to reach out to touch the ball. How many balls can you touch to ensure that there is at least one white table tennis ball?
###Input format:
The input contains multiple groups of test data, one line in each group, including two positive integers a and B (meaning as described above)
###Output format:
Each output line, that is, at least touch a few balls to ensure that there must be a white table tennis ball.
###Input example:
Here is a set of inputs. For example:
```in
3 3
```
###Output example:
The corresponding output is given here. For example:
```out
four
```
answer：If there is no answer, please comment
###Input format:
The input contains multiple groups of test data, one line in each group, including two positive integers a and B (meaning as described above)
###Output format:
Each output line, that is, at least touch a few balls to ensure that there must be a white table tennis ball.
###Input example:
Here is a set of inputs. For example:
```in
3 3
```
###Output example:
The corresponding output is given here. For example:
```out
four
```
answer：If there is no answer, please comment