#include <stdio.h>

int main()
{
  char input1[4], input2[4], input3[4];
  int red=0, blue=0;
  scanf("%s",input1);
  scanf("%s",input2);
  scanf("%s",input3);

  if(input1[0]=='R'){
    red = red+1;
  }
  else{
    blue = blue+1;
  }

  if(input2[0]=='R'){
    red = red+1;
  }
  else{
    blue = blue+1;
  }

  if(input3[0]=='R'){
    red = red+1;
  }
  else{
    blue = blue+1;
  }

  if(red>blue){
    printf("RED\n");
  }
  else{
    printf("BLUE\n");
  }
  return 0;
}