import java.io.*;
import java.util.*;

public class Main {
    static final int MOD = 1000000007;
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        int[][] dp = new int[n + 1][10];
        dp[0][0] = 1;
        for (int i = 1; i <= n; i++) {
            int value = 0;
            for (int j = 0; j < 10; j++) {
                value += dp[i - 1][j];
                value %= MOD;
                dp[i][j] = value;
            }
        }
        int ans = 0;
        for (int i = 0; i < 10; i++) {
            ans += dp[n][i];
            ans %= MOD;
        }
        System.out.println(ans);
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public String nextLine() throws Exception {
        return br.readLine();
    }
    
    public String next() throws Exception {
        if (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
}