import java.util.Scanner;

class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		String ans = e - a > k ? ":(" : "Yay!";

		System.out.println(ans);

		sc.close();
	}
} import java.util.Scanner; Scanner java.util class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		String ans = e - a > k ? ":(" : "Yay!";

		System.out.println(ans);

		sc.close();
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		String ans = e - a > k ? ":(" : "Yay!";

		System.out.println(ans);

		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		String ans = e - a > k ? ":(" : "Yay!";

		System.out.println(ans);

		sc.close();
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc sc.nextInt() sc.nextInt sc sc.nextInt() sc.nextInt sc sc.nextInt() sc.nextInt sc int e = sc.nextInt(); e sc.nextInt() sc.nextInt sc int k = sc.nextInt(); k sc.nextInt() sc.nextInt sc String ans = e - a > k ? ":(" : "Yay!"; ans e - a > k ? ":(" : "Yay!" e - a > k e - a e a k ":(" "Yay!" System.out.println(ans) System.out.println System.out System System.out ans sc.close() sc.close sc String[] args args
import java.util.Scanner;

class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		String ans = e - a > k ? ":(" : "Yay!";

		System.out.println(ans);

		sc.close();
	}
}
