import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

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

	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

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

	}

} Main public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

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

	} main {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

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

	} 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 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) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

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

	}

} public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

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

	}

} Main
import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

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

	}

}