<?php
$color1=trim(fgets(STDIN));
$color2=trim(fgets(STDIN));
$color3=trim(fgets(STDIN));

$array=[$color1,$color2,$color3];
$red=0;
$blue=0;
foreach($array as$value){
  if($value=="RED"){
    $red++;
  }else{
    $blue++;
  }
}
if($red>$blue){
  echo "RED";
}else{
  echo "BLUE";
}