#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < n; i++)
#define srep(i,a,b) for(int i = a; i < b; i++)
#define all(A) (A).begin(),A.end()
#define MOD 1000000007
using namespace std;
using ll = long long;
using P = pair<char,int>;
using Graph = vector<vector<int>>;

bool judge(int x){
	bool ok4 = 0,ok6 = 0;
	while(x){
		if(x%10 == 4) ok4 = 1;
		else if(x%10 == 6) ok6 = 1;
		x /= 10;
	}
	return (ok4 && ok6);
}

int main(void){
	int n; cin >> n;
	cout << (judge(n) ? "Beautiful" : "...");
}