#include <bits/stdc++.h>
#define f first
#define s second
#define mp make_pair
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define sz(x) ((int) (x).size())
using namespace std;

using ll = long long;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using vi = vector<int>;
using vp = vector <pii>;
using vl = vector<ll>;

const int inf = INT_MAX;
const ll linf = LLONG_MAX;


int main() {
    string s;
    cin >> s;
    if(count(all(s), 'T') >= 3) cout << "T1\n";
    else cout << "DRX\n";
    return 0;
}