
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		if(!(e-a>k)) {
			System.out.print("Yay!");
		} else {
			System.out.print(":(");
		}
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		if(!(e-a>k)) {
			System.out.print("Yay!");
		} else {
			System.out.print(":(");
		}
	}
} Main public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		if(!(e-a>k)) {
			System.out.print("Yay!");
		} else {
			System.out.print(":(");
		}
	} main {

		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		if(!(e-a>k)) {
			System.out.print("Yay!");
		} else {
			System.out.print(":(");
		}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int b = sc.nextInt(); b sc.nextInt() sc.nextInt sc int c = sc.nextInt(); c sc.nextInt() sc.nextInt sc int d = sc.nextInt(); d 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 if(!(e-a>k)) {
			System.out.print("Yay!");
		} else {
			System.out.print(":(");
		} !(e-a>k) (e-a>k) e-a e a k {
			System.out.print("Yay!");
		} System.out.print("Yay!") System.out.print System.out System System.out "Yay!" {
			System.out.print(":(");
		} System.out.print(":(") System.out.print 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 = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		if(!(e-a>k)) {
			System.out.print("Yay!");
		} else {
			System.out.print(":(");
		}
	}
} public class Main {
	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		if(!(e-a>k)) {
			System.out.print("Yay!");
		} else {
			System.out.print(":(");
		}
	}
} Main

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		if(!(e-a>k)) {
			System.out.print("Yay!");
		} else {
			System.out.print(":(");
		}
	}
}