import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int a1 = sc.nextInt(); sc.nextInt();
		int a2 = sc.nextInt(); sc.nextInt();
		int a3 = sc.nextInt(); sc.nextInt();
		sc.close();

		if (a1 % 2 == 1 && a2 % 2 == 1 && a3 % 2 == 1) {
			System.out.println(":-(");
		} else {
			System.out.println(":-)");
		}
	}
}