#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
#define int long long

void solve() {
    string s;
    cin >> s;
    int n = (int)s.size();
    int cnt1 = 0, cnt2 = 0;
    for(int i = 0; i < n; i++) {
        cnt1 += (s[i] == 'T');
        cnt2 += (s[i] == 'D');
    }
    if(cnt1 >= 3) {
        cout << "T1\n";
    } else {
        cout << "DRX\n";
    }
}          
    
signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);

    int T = 1;
    // cin >> T;
    while(T--) solve();

    return 0;
}