package main

import (
	"fmt"
	"math"
)

func gcd(A int, B int) int {

	if B == 0 {
		return A
	}
	return gcd(B, A%B)
}

func main() {
	var A, B int
	fmt.Scan(&A, &B)

	var c float64
	c = float64(gcd(A, B))

	if math.Sqrt(c) == math.Floor(math.Sqrt(c)) {
		fmt.Println("Odd")
	} else {
		fmt.Println("Even")
	}

}