#include <stdio.h>
#include <string.h>
void main(void){
	char balloon[100] = "a";
	int red = 0, blue = 0;
	for(int i = 0; i < 3;i++){
		scanf("%s",balloon);
		if(strcmp(balloon,"RED") == 0){
			red++;
		}else{
			blue++;
		}
	}
	if(red > blue){
		printf("RED");
	}else{
		printf("BLUE");
	}
}