#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef tuple<int, int, int> tii;

#define eb emplace_back
#define pb push_back
#define all(s) (s).begin(), (s).end()
#define rep(i, a, b) for (int i = (a); i <= (b); ++i)
#define per(i, a, b) for (int i = (a); i >= (b); --i)

inline int rd() {
    int x = 0;
    bool f = 0;
    char c = getchar();
    for (; !isdigit(c); c = getchar()) f |= (c == '-');
    for (; isdigit(c); c = getchar()) x = x * 10 + (c ^ 48);
    return f ? -x : x;
}

int main() {
    string s; cin >> s;
    map<char, int> f;
    for (auto x : s) {
        ++f[x];
        if (f[x] == 3) {
            puts(x == 'T' ? "T1" : "DRX");
            return 0;
        }
    }
    return 0;
}