Print all positive integers that do not exceed $n$ and divisible by $2$ in descending order.
### Input
- A single line contains an integer $n$.
### Output
- Print all positive integers that do not exceed $n$ and divisible by $2$ in descending order.
### Constraints
- $2 \le n \le 1000$.
### Example
Input:
```
7
```
Output:
```
6 4 2
```
