#include <iostream>
#include <vector>
using namespace std;
const long long MOD = 1000000007;
int main(){
	int N;
	cin >> N;
	vector<vector<long long>> dp(N + 1, vector<long long>(10, 0));
	dp[0][0] = 1;
	for (int i = 0; i < N; i++){
		long long sum = 0;
		for (int j = 0; j < 10; j++){
			sum += dp[i][j];
			sum %= MOD;
			dp[i + 1][j] = sum;
		}
	}
	long long ans = 0;
	for (int i = 0; i < 10; i++){
		ans += dp[N][i];
	}
	ans %= MOD;
	cout << ans << endl;
}