Find the integer solution of the equation: $ax + b = 0$.
### Input
- A single line containing two integers $a, b$.
### Output
- Print an integer which is the solution of the equation. If there are infinite solutions, print `INFINITE SOLUTIONS`. If no integer solution exists, print `NO SOLUTION`.
### Constraints
- $-100 \le a, b \le 100$.
### Sample test
Input:
```
3 6
```
Output:
```
-2
```
