#include <iostream>
using namespace std;

int main(){
    string col;
    int cnt = 0;
    int red = 0;
    for(int i = 0; i < 3; i++){
        cnt+=1;
        cin >> col;
        if(col=="RED"){ red+=1; }
    } 
    if(cnt < red){ cout << "RED" << endl; }
    else{ cout << "BLUE" << endl; }
    return 0;
}