import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner in = new Scanner(System.in);
        int sum = 0;
        
        for(int i=0; i<3; i++){
            double N = in.nextDouble();
            double M = in.nextDouble();
            int L = (int)Math.pow(N, M);
            sum += L;
        }

        if(solve(sum)){
            System.out.println(":-)");
        }else{
            System.out.println(":-(");
        }
        
        // if(sum % 2 == 0){
        //     System.out.println("\":-)\"");
        // }else{
        //     System.out.println("\":-(\"");            
        // }
        
    }
    
    static boolean solve(int sum){
        if(sum % 2 == 0)
            return true;
        return false;
    }

}