import java.util.*;

public class Main {
    static final int MOD = 1000000007;
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[][] dp = new int[n + 1][10];
        for (int i = 0; i < 10; i++) {
            dp[1][i] = i + 1;
        }
        for (int i = 2; i <= n; i++) {
            for (int j = 0; j < 10; j++) {
                if (j == 0) {
                    dp[i][j] = dp[i - 1][j];
                } else {
                    dp[i][j] = (dp[i - 1][j] + dp[i][j - 1]) % MOD;
                }
            }
        }
        System.out.println(dp[n][9]);
    }
}