#include <stdio.h>
#include <algorithm>
using namespace std;
using ll = long long;

int main() {
	char b[3][5];
	scanf("%s %s %s", b[0], b[1], b[2]);
	int red = 0, blue = 0;
	for (int i = 0; i < 3; i++)
		(b[i][0] != 'B' ? red : blue)++;
	printf("%s\n", red < blue ? "BLUE" : "RED");
}