#include <bits/stdc++.h>
#define REP(i, a, n) for(ll i=a; i<n; i++)
#define RREP(i, a, n) for(ll i=n-1; i>=a; i--)
typedef long long ll;
const ll mod =1e9+7;
const ll inf =1e18;
using namespace std;

ll N;
ll dp[11];
int main() {
    cin>>N;

    dp[0]=1;
    REP(i, 0, N+1){
        REP(i, 1, 10){
            dp[i]+=dp[i-1];
            dp[i]%=mod;
        }
    }
    cout<<dp[9]<<endl;
    return 0;
}