e--Number game

Time Limit: 2000 ms Memory Limit: 65536 KiB

Problem Description

Dreamtale loves playing with numbers. He only knows prime numbers that are digits yet. These numbers are 2, 3, 5 and 7, he came up a game that were connected with them.
 
Deamtale wants to find the minimum number of length n, such that it is simultaneously divisible by all numbers Dreamtale already knows (2, 3, 5 and 7). Help him with that.
 
A number's length is the number of digits in its decimal representation without leading zeros.

Input

A single input line contains a single integer n (1≤n≤10^5).

Output

Print a single integer — the answer to the problem without leading zeroes, or "-1" (without the quotes), if the number that meet the problem condition does not exist.

Sample Input

1
5

Sample Output

-1
10080

Hint

 

Source

Rocky