package main

import . "fmt"

func main() {
	var s,t string
	Scan(&s,&t)
	m:=map[string]bool{
		"shrinebell":true,
		"watermelon":true,
		"beachball":true,
	}
	delete(m,s)
	delete(m,t)
	for x:=range m {
		Println(x)
	}
}