#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define pll pair<ll, ll>
const int N = 1e6 + 50;
const int mod = 998244353;


void solve()
{
    ll r1 = 0, r2 = 0;
    string s;
    cin >> s;
    for (auto it : s)
    {
        if (it == 'T') r1 ++;
        if (it == 'D') r2 ++;
    }
    if (r1 == 3) cout << "T1";
    else cout << "DRX";
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    ll T = 1;
    //cin >> T;
    while (T --)
    {
        solve();
    }
    return 0;
}