import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!
        Scanner sc = new Scanner(System.in);
        int seki = 0;
        int sum = 0;
        for(int i=0;i<3;i++)
        {
            int num = sc.nextInt();
            int num2 = sc.nextInt();
            if(num%2==1)
            {
                sum++;
            }
        }
        if(sum%2==0)
        {
            System.out.println(":-)");
        }
        else
        {
            System.out.println(":-(");
        }
    }
}