let input = require("fs").readFileSync("/dev/stdin","utf-8").split("\n");
let keta = input[0].length;
let yoso = input[0].split("");
let yon = 0;
let roku = 0;
for (let i = 0; i < keta; i++) {
	if (yoso[i] == 4) {
		yon += 1;
	} else if (yoso[i] == 6) {
		roku += 1;
	}
}
if (yon > 0 && roku > 0) {
	console.log("Beautiful");
} else {
	console.log("...");
}