#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=a;i<b;i++)
using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); }
//---------------------------------------------------------------------------------------------------


string A, B, C;
//---------------------------------------------------------------------------------------------------
void _main() {
    cin >> A >> B >> C;

    int a = 0, b = 0;
    
    if (A[0] == 'R') a++;
    else b++;
    if (B[0] == 'R') a++;
    else b++;
    if (C[0] == 'R') a++;
    else b++;

    if (a > b) printf("RED\n");
    else printf("BLUE\n");
}