#include "bits/stdc++.h"

#define REP(i, n, N) for(ll i=(n); i<(N); i++)
#define RREP(i, n, N) for(ll i=(N-1); i>=n; i--)
#define CK(n, a, b) ((a)<=(n)&&(n)<(b))
#define ALL(v) (v).begin(),(v).end()
#define MCP(a, b) memcpy(b,a,sizeof(b))
#define p(s) cout<<(s)<<endl
#define p2(a, b) cout<<(a)<<" "<<(b)<<endl
#define v2(T) vector<vector<T>>
typedef long long ll;
using namespace std;
const ll mod = 1e9 + 7;
const ll inf = 1e18;

ll N;
ll ans;
ll dp[1000010][10];
int main() {
    cin>>N;
    dp[0][0]=1;
    REP(i,0,N){
        REP(j,0,10){
            REP(k,j,10){
                dp[i+1][k] += dp[i][j];
                dp[i+1][k] %= mod;
            }
        }
    }
    REP(i,0,10){
        ans += dp[N][i];
        ans %= mod;
    }
    p(ans);
    return 0;
}