import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        long[][] t = new long[3][2];
        Scanner sc = new Scanner(System.in);
        for(int i=0;i<3;i++){
            t[i][0] = sc.nextLong();
            t[i][1] = sc.nextLong();
        }
        sc.close();

        int c = 0;
        for(int i=0; i<3 ;i++){
            if(t[i][0] % 2 == 0) c++;
        }

        if(c==1 || c== 3){
            System.out.println(":-)");
        }else{
            System.out.println(":-(");
        }
    }
}