#include<iostream>
#include<string>
using namespace std;
#define int long long
#define rep(i,n) for(int i = 0; i < n; i++)
#define INF (long long)(1e18)
#define MOD (int)(1e9+7)
#define MAX_V

signed main(){
	int N, ans = 10, b = 1, temp[12] = {1,};
	
	cin>>N;
	
	for(int i = 0; i <= N; i++){
		for(int j = 1; j < 10; j++){
			temp[j] += temp[j-1];
			temp[j] %= MOD;
		}
	}
	
	cout<<temp[9]<<endl;
	
	
	return 0;
}