Find the smallest natural number
x that satisfies the following conditions:
Input
A single integer d (1 \le d \le 10^5).
Output
Print the answer.
Examples
| standard input | standard output |
|---|
| 1
| 6
|
| 2
| 15
|
Note
In the second example:
15 has 4 divisors (1,3,5,15), and all divisors are at least d=2 apart.