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Function Description

Complete the function properPreparation in the editor below.

proper Preparation has the following parameter:

$n$ : an integer

Returns

int the number of good strings, modulo $({10}^9+7)$

Constraints

$*1n{10}^5$

Input Format For Custom Testing

The first and only line contains an integer, $n,$ denoting the length of the string.

Sample Case $0$

Sample Input for Custom Testing

Sample Output

$1460$

Explanation

One good string of length $5$ is "preep" and there are a total of $1460$ of them.

Sample Case $1$

Sample input For Custom Testing