#include <bits/stdc++.h>
using namespace std;

int main() {
  int n;
  long long dp[1000000][10], cd[1000000][10];
  cin >> n;
  for (int i = 0; i < n; ++i) {
    for (int j = 0; j < 10; ++j) {
      if (i == 0) dp[i][j] = 1;
      else dp[i][j] = cd[i-1][j];
      if (j == 0) cd[i][j] = dp[i][j];
      else cd[i][j] = cd[i][j-1] + dp[i][j];
      cd[i][j] %= 1000000007;
      dp[i][j] %= 1000000007;
    }
  }
  cout << cd[n-1][9] << '\n';
}