#!/usr/bin/env python3

from pprint import pprint
from sys import setrecursionlimit, stdin
from typing import Dict, Iterable, Set

INF: int = 1 << 62
setrecursionlimit(1_000_000)


def inputs(type_=int):
    ins = input().split(' ')
    ins = [x for x in ins if x != '']

    if isinstance(type_, Iterable):
        return [t(x) for t, x in zip(type_, ins)]
    else:
        return list(map(type_, ins))


def input_(type_=int):
    a, = inputs(type_)
    return a


inputi = input_


def inputstr():
    return input_(str)


def answer(res) -> None:
    print(res)
    exit()


# start coding
n = input()
if '4' in n and '6' in n:
    print('Beautiful')
else:
    print('...')