// No.1721 [Cherry 3rd Tune N] 麗しきNumber
package main

import (
	"fmt"
	"strings"
)

func main() {
	var n string
	fmt.Scan(&n)

	if strings.Contains(n, "4") && strings.Contains(n, "6") {
		fmt.Println("Beautiful")
	} else {
		fmt.Println("...")
	}
}