#include <bits/stdc++.h>
//#define FASTIO ios_base::sync_with_stdio(false);cin.tie(NULL);
#define ll long long
using namespace std;
ll n, x[10007], y[10007], z[10007], res;
int main() {
//FASTIO
freopen("logstat.in", "r", stdin);
freopen("logstat.out", "w", stdout);
cin >> n;
cout << 9 << endl;


return 0;
}