#include <iostream>
using namespace std;
int main(void){
    // Your code here!
     string a,b,c;
     cin >> a >> b >> c;
     int red,blue;
     red = 0; 
     blue = 0;
     if (a == "RED"){
        red ++;
     }else{blue++;}
     if (b == "RED"){
        red ++;
     }else{blue++;}
     if (c == "RED"){
        red ++;
     }else{blue++;}
    
     if (red > blue){
        cout << "RED"<< endl;
     }else{cout << "BLUE"<< endl;}

}