<?php
$red = $blue = 0;
for($i=0;$i<3;$i++){
    switch(trim(fgets(STDIN))){
        case 'RED':
            $red++;
            break;
        case 'BLUE':
            $blue++;
            break;
    }
}
if($blue>$red) echo 'BLUE'."\n";
elseif ($blue<$red) echo 'RED'."\n";