#include <stdio.h>

int main(void) {
	int r = 0, b = 0;
	char s[4];
	while(scanf("%s", s) != EOF){
		if(s[0] == 'R')r++;
		if(s[0] == 'B')b++;
	}
	if(r > b)printf("RED\n");
	else printf("BLUE\n");

	return 0;
}