#include <cstdio>
int main(){
    int red=0,blue=0;char s[5];
    for(int i=0;i<3;i++){
        scanf("%s",s);
        if(s[0]=='R')red++;
        else blue++;
    }
    if(red>blue)printf("RED\n");
    else printf("BLUE\n");
    return 0;
}