package main

import "fmt"

func main() {
	var red, blue int
	var n string
	for i := 0; i < 3; i++ {
		fmt.Scan(&n)
		if n == "RED" {
			red += 1
		} else if n == "BLUE" {
			blue += 1
		}
	}
	if blue > red {
		fmt.Println("BLUE")
	} else {
		fmt.Println("RED")
	}
}