import java.util.Scanner;

public class Main {

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

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

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

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int a = scanner.nextInt();
		int b = scanner.nextInt();
		int c = scanner.nextInt();
		int d = scanner.nextInt();
		int e = scanner.nextInt();
		int k = scanner.nextInt();
		System.out.println(e - a > k ? ":(" : "Yay!");
		scanner.close();
	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int a = scanner.nextInt();
		int b = scanner.nextInt();
		int c = scanner.nextInt();
		int d = scanner.nextInt();
		int e = scanner.nextInt();
		int k = scanner.nextInt();
		System.out.println(e - a > k ? ":(" : "Yay!");
		scanner.close();
	}
}