import java.util.*;

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