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());
		sc.close();

		if(e - a <= k) {
			System.out.println("Yay!");
		}else {
			System.out.println(":(");
		}
	}
} 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());
		sc.close();

		if(e - a <= k) {
			System.out.println("Yay!");
		}else {
			System.out.println(":(");
		}
	}
} 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());
		sc.close();

		if(e - a <= k) {
			System.out.println("Yay!");
		}else {
			System.out.println(":(");
		}
	} 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());
		sc.close();

		if(e - a <= k) {
			System.out.println("Yay!");
		}else {
			System.out.println(":(");
		}
	} 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 sc.close() sc.close sc if(e - a <= k) {
			System.out.println("Yay!");
		}else {
			System.out.println(":(");
		} e - a <= k e - a e a k {
			System.out.println("Yay!");
		} System.out.println("Yay!") System.out.println System.out System System.out "Yay!" {
			System.out.println(":(");
		} System.out.println(":(") System.out.println System.out System System.out ":(" 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());
		sc.close();

		if(e - a <= k) {
			System.out.println("Yay!");
		}else {
			System.out.println(":(");
		}
	}
} 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());
		sc.close();

		if(e - a <= k) {
			System.out.println("Yay!");
		}else {
			System.out.println(":(");
		}
	}
} 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());
		sc.close();

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