import java.util.Scanner;
public class No892{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int d = sc.nextInt();
        int e = sc.nextInt();
        int f = sc.nextInt();
        long firstNumber = a^b;
        long secNumber = c^d;
        long thirdNumber = e^f;
        if ((firstNumber+secNumber+thirdNumber)%2 == 0){
            System.out.println(":-)");
        } else {
            System.out.println(":-(");
        }
    }
}