#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000001

int main(){
	
	string s;
	cin>>s;
	bool f4 = false,f6 = false;
	rep(i,s.size()){
		if(s[i]=='4')f4 = true;
		if(s[i]=='6')f6 = true;
	}
	
	cout<<((f4&&f6)?"Beautiful":"...")<<endl;
	
	return 0;
}