#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
int main(void){
	int red = 0;
	int blue = 0;
	char color[5];
	
	for(int i = 0; i < 3; i++){
		gets(color);
		if(color[0] == 'R'){
			red++;
		}else if(color[0] == 'B'){
			blue++;
		}
	}
	
	if(red > blue){
		printf("RED\n");
	}else{
		printf("BLUE\n");
	}
	return 0;
}