import java.util.*;

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