import java.util.Scanner

data class Count(var red: Int, var blue: Int)

class No516() {
	val input = Scanner(System. `in`)
	val count = Count(0, 0)

	fun colorCount(): String {
		for (i in 0..2) {
			val color = input.next()
			if (color == "RED") count.red++ else count.blue++
		}
		if (count.red < count.blue) return "BLUE" else return "RED"
	}

}

fun main(args: Array<String>) {
	val no516 = No516()
	println(no516.colorCount())
}