using System;
using System.Collections.Generic;
using System.Linq;

public class Yuki892
{
	public static void Main()
	{
		var a = Console.ReadLine().Split().Select(x => int.Parse(x)).ToList();
		var ans = ((a[0] + a[2]+ a[4]) % 2 == 0 ? ":-)" : ":-(");
		Console.WriteLine(ans);
	}
}