#include<bits/stdc++.h>  
using namespace std;
typedef long long ll;
//typedef __int128 lll;
const int N = 5e6 + 5;
ll n, b, k, m;
ll mod = 1e9 + 9;
ll d[10000005]{},cnt=0;
bool vis[10000005]{};
vector<int> prime;
void pre()
{
  
}
void solve() {
    string s;
    cin >> s;
    int t = 0;
    for (auto i : s)
    {
        if (i == 'T')t++;
    }
    if (t >= 3) cout << "T1" << endl;
    else cout << "DRX" << endl;
}
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
   // pre();
    int T = 1;
    //cin >> T;
    while (T--) {
        solve();
    }
}