#include "bits/stdc++.h"

using namespace std;

using ll = long long;
using ld = long double;

const double PI = 3.1415926535897932384626433832795;

const int dx[] = { 0, 1, 0, -1 };
const int dy[] = { -1, 0, 1, 0 };

int gcd(int x, int y) { return y ? gcd(y, x % y) : x; }
ll gcd(ll x, ll y) { return y ? gcd(y, x % y) : x; }
int lcm(int x, int y) { return x / gcd(x, y) * y; }
ll lcm(ll x, ll y) { return x / gcd(x, y) * y; }

const ll MOD = 1000000007;

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);

	int n;
	cin >> n;

	vector<vector<int>> dp(n + 1, vector<int>(10));
	for (int i = 0; i <= n; i++) {
		dp[i][0] = 1;
	}

	for (int i = 0; i < 10; i++) {
		dp[0][i] = 1;
	}

	for (int i = 1; i <= n; i++) {
		for (int j = 1; j < 10; j++) {
			dp[i][j] = (dp[i][j - 1] + dp[i - 1][j]) % MOD;
		}
	}

	cout << dp[n][9] << endl;
	return 0;
}