#P1088A. Ehab and another construction problem
Ehab and another construction problem
Description
Given an integer $x$, find 2 integers $a$ and $b$ such that:
- $1 \le a,b \le x$
- $b$ divides $a$ ($a$ is divisible by $b$).
- $a \cdot b>x$.
- $\frac{a}{b}<x$.
The only line contains the integer $x$ $(1 \le x \le 100)$.
You should output two integers $a$ and $b$, satisfying the given conditions, separated by a space. If no pair of integers satisfy the conditions above, print "-1" (without quotes).
Input
The only line contains the integer $x$ $(1 \le x \le 100)$.
Output
You should output two integers $a$ and $b$, satisfying the given conditions, separated by a space. If no pair of integers satisfy the conditions above, print "-1" (without quotes).
Samples
10
6 3
1
-1