#include <bits/stdc++.h> using namespace std; int main() { ios_base::sync_with_stdio(false); cin.tie(nullptr); int N; cin >> N; string s; cin >> s; for(int i=0; i<N-2; i++){ string t = s.substr(i,3); if(t == "404"){ cout << "Found" << endl; return 0; } } cout << "NotFound" << endl; }