#include "bits/stdc++.h"
#include "bits/extc++.h"

using namespace std;
using namespace __gnu_pbds;

using ll = long long;
using ull = unsigned long long;

#define IOS ios::sync_with_stdio(0);cin.tie(0);
#define endl "\n"
#define hash gp_hash_table
#define yes cout<<"YES"<<endl;
#define no cout<<"NO"<<endl;
#define lowbit(x) x&(-x)
#define int ll
#define trees tree<int, null_type, less<>, rb_tree_tag, tree_order_statistics_node_update>
const int mod = 998244353;

void solve() {
    string s;
    cin >> s;
    int d=0, t=0;
    for (auto i: s) {
        if(i=='D'){
            d++;
        }else if(i=='T'){
            t++;
        }
    }
    if(d>t){
        cout<<"DRX"<<endl;
    }else if(t>d){
        cout<<"T1"<<endl;
    }else{
        assert(0);
    }

}


signed main() {

    IOS
    int t = 1;
//    cin >> t;
    while (t--)solve();
}