#include<stdio.h>
#include<string.h>
#include<stdlib.h>
int main(void){
char s[3][25];
scanf("%s",s[0]);
scanf("%s",s[1]);
scanf("%s",s[2]);
int r=0,b=0;
if(s[0][0]=='R'){r++;}
else{b++;}
if(s[1][0]=='R'){r++;}
else{b++;}
if(s[2][0]=='R'){r++;}
else{b++;}

if(r>b){printf("RED\n");}
else{printf("BLUE\n");}
}