// No.2599 Summer Project
package main

import "fmt"

func main() {
	var s, t string
	fmt.Scan(&s, &t)
	for _, v := range []string{"watermelon", "beachball", "shrinebell"} {
		if string(v) == s {
		} else if string(v) == t {
		} else {
			fmt.Println(string(v))
		}
	}
}