import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = Integer.parseInt(sc.next());
        int b = Integer.parseInt(sc.next());
        int c = Integer.parseInt(sc.next());
        int d = Integer.parseInt(sc.next());
        int e = Integer.parseInt(sc.next());
        int k = Integer.parseInt(sc.next());

        System.out.println((e - a) <= k ? "Yay!" : ":(");
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = Integer.parseInt(sc.next());
        int b = Integer.parseInt(sc.next());
        int c = Integer.parseInt(sc.next());
        int d = Integer.parseInt(sc.next());
        int e = Integer.parseInt(sc.next());
        int k = Integer.parseInt(sc.next());

        System.out.println((e - a) <= k ? "Yay!" : ":(");
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = Integer.parseInt(sc.next());
        int b = Integer.parseInt(sc.next());
        int c = Integer.parseInt(sc.next());
        int d = Integer.parseInt(sc.next());
        int e = Integer.parseInt(sc.next());
        int k = Integer.parseInt(sc.next());

        System.out.println((e - a) <= k ? "Yay!" : ":(");
    } main {
        Scanner sc = new Scanner(System.in);
        int a = Integer.parseInt(sc.next());
        int b = Integer.parseInt(sc.next());
        int c = Integer.parseInt(sc.next());
        int d = Integer.parseInt(sc.next());
        int e = Integer.parseInt(sc.next());
        int k = Integer.parseInt(sc.next());

        System.out.println((e - a) <= k ? "Yay!" : ":(");
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = Integer.parseInt(sc.next()); a Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int b = Integer.parseInt(sc.next()); b Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int c = Integer.parseInt(sc.next()); c Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int d = Integer.parseInt(sc.next()); d Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int e = Integer.parseInt(sc.next()); e Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc int k = Integer.parseInt(sc.next()); k Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc System.out.println((e - a) <= k ? "Yay!" : ":(") System.out.println System.out System System.out (e - a) <= k ? "Yay!" : ":(" (e - a) <= k (e - a) e a k "Yay!" ":(" String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = Integer.parseInt(sc.next());
        int b = Integer.parseInt(sc.next());
        int c = Integer.parseInt(sc.next());
        int d = Integer.parseInt(sc.next());
        int e = Integer.parseInt(sc.next());
        int k = Integer.parseInt(sc.next());

        System.out.println((e - a) <= k ? "Yay!" : ":(");
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = Integer.parseInt(sc.next());
        int b = Integer.parseInt(sc.next());
        int c = Integer.parseInt(sc.next());
        int d = Integer.parseInt(sc.next());
        int e = Integer.parseInt(sc.next());
        int k = Integer.parseInt(sc.next());

        System.out.println((e - a) <= k ? "Yay!" : ":(");
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = Integer.parseInt(sc.next());
        int b = Integer.parseInt(sc.next());
        int c = Integer.parseInt(sc.next());
        int d = Integer.parseInt(sc.next());
        int e = Integer.parseInt(sc.next());
        int k = Integer.parseInt(sc.next());

        System.out.println((e - a) <= k ? "Yay!" : ":(");
    }
}
