#include<iostream>
#include<map>

using namespace std;

using ll=long long;

ll mod=1e9+7;
map<pair<int,int>,ll> Memo;

ll f(int x,int n){
    if (n==1) return 1;
    if (Memo.count(make_pair(x,n))==1) return Memo[make_pair(x,n)];

    ll A=0;
    for (int i=0;i<=x;i++) A+=f(i,n-1);
    A%=mod;
    
    return Memo[make_pair(x,n)]=A;
}
int main(){
    int N;
    cin >> N;
    
    ll X=0;
    for (int i=0;i<=9;i++) X+=f(i,N);
    cout << X%mod << endl;
}