#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;

int main() {
    
    int red = 0,blue = 0;
    string s;
    for(int i = 0;i < 3;i++){
        cin >> s;
        if(s == "RED")red++;
        else if(s == "BLUE")blue++;
    }
    if(red > blue)cout << "RED";
    else cout << "BLUE";
    
    return 0;
}