#include <stdio.h>
#include <string.h>
char s1[5],s2[5],s3[5];
int red,blue;
int main(void){
	scanf("%s",s1);
		if(strcmp(s1,"RED")) blue++;
		else red++;
	scanf("%s",s2);
		if(strcmp(s2,"RED")) blue++;
		else red++;
	scanf("%s",s3);
		if(strcmp(s3,"RED")) blue++;
		else red++;
	if(red>blue) printf("RED");
	else printf("BLUE");
	return 0;
}