#include <bits/stdc++.h>
using namespace std;
int n;
char a[10005];
string target = "28tech";
int main(){
cin >> n;
for (int i = 0; i < n; i++) cin >> a[i];
int cnt = 0;
for (int i = 0; i < n; i+=2){
if (a[i] == target[cnt]) ++cnt;
}
cout << (cnt == 6 ? "28TECH" : "HCET82");
return 0;
}
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