PROGRAMMING:Flop
The so-called flip, is the original face up card turned over into the back up, the original back up card turned over into the front up.
Now there are $$n $$playing cards on the table, face up, and they are numbered $$1 $, $$2 $, $$dots $, $$n $. First, the multiple of $$2 $, then the multiple of $$3 $, and then the multiple of $$4 $, $$5 $,..., $$n $.
Which cards are facing up.
####Input format
>Number of playing cards $$n $$(0 < n / Leq 10000)$$
####Output format
>The number facing the license plate (separated by spaces)
####Input sample
```in
six
```
####Output sample
```out
1 4
```
answer：If there is no answer, please comment
Now there are $$n $$playing cards on the table, face up, and they are numbered $$1 $, $$2 $, $$dots $, $$n $. First, the multiple of $$2 $, then the multiple of $$3 $, and then the multiple of $$4 $, $$5 $,..., $$n $.
Which cards are facing up.
####Input format
>Number of playing cards $$n $$(0 < n / Leq 10000)$$
####Output format
>The number facing the license plate (separated by spaces)
####Input sample
```in
six
```
####Output sample
```out
1 4
```
answer：If there is no answer, please comment