#include<stdio.h>
int main(void){
	int i,r=0,b=0;
	char s[8];
	for(i = 1;i <= 3;i++){
		scanf("%s",s);
		if(s[0]=='R'){r++;}else{b++;}
	}
	if(r>s){printf("RED\n");}else{printf("BLUE\n");}
	return 0;
}