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

int solve(){
	string str;
	cin>>str;
	int cnt=0;
	for(int i=0;i<str.size();i++){
		cnt+=(str[i]=='T');
		cnt-=(str[i]=='D');	
	}
	if(cnt>0)cout<<"T1"<<endl;
	else cout<<"RDX"<<endl;
}

int main(){
	int tc=1;
	//cin>>tc;
	while(tc--)solve();
	return 0;
}