import java.util.*;

public class Main {
	public static void main (String[] args) {
		Scanner sc = new Scanner(System.in);
		int sum = 0;
		for (int i = 0; i < 3; i++) {
		    sum += sc.nextInt() % 2;
		    sc.nextInt();
		}
		if (sum % 2 == 0) {
		    System.out.println(":-)");
		} else {
		    System.out.println(":-(");
		}
	}
}