<?php
while ($line = fgets(STDIN)) {
	$s[] = trim($line);
}

$RED_counter = 0;
$BLUE_counter = 0;
foreach ($s as $key => $value) {
    if ($value === "RED") {
        $RED_counter++;
    } else {
        $BLUE_counter++;
    }
}

if ($RED_counter > $BLUE_counter) {
    echo "RED".PHP_EOL;
} else {
    echo "BLUE".PHP_EOL;
}
?>