#include<iostream>
#include<vector>
#include<algorithm>
#include<functional>
#include<queue>
#include<stack>
#include<set>
#include<map>
#include<unordered_map>
#include<climits>
#include<cstdlib>
#include<cmath>
#include<string>
#include<iomanip>

using namespace std;

#define INF 1 << 29
#define LL long long int

LL const MOD = 1000000007;

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

    LL n;
    cin >> n;

    vector<vector<LL>> dp(n,vector<LL>(10,0));

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

    for(int i = n-2; i >= 0; i--){
        for(int j = 0; j < 10; j++){
            for(int k = 0; k <= j; k++){
                dp[i][j] += dp[i+1][k];
                dp[i][j] %= MOD;
            }
        }
    }

    LL ans = 0;
    for(int i = 0; i < 10; i++){
        ans += dp[0][i];
        ans %= MOD;
    }

    cout << ans << endl;
    
    return 0;
}