#include<stdio.h>

int main(int argc, char const *argv[]){
	char s[5];
	int a=0,b=0;
	scanf("%s",s);
	if(s[0]=='R') a++;
	else b++;
	getchar();
	scanf("%s",s);
	if(s[0]=='R') a++;
	else b++;
	getchar();
	scanf("%s",s);
	if(s[0]=='R') a++;
	else b++;
	getchar();
	if(a>b) printf("RED\n");
	else printf("BLUE\n");
	return 0;
}