import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		try (Scanner s = new Scanner(System.in)) {
			final int A = s.nextInt();
			s.nextInt();
			s.nextInt();
			s.nextInt();
			final int E = s.nextInt();
			final int K = s.nextInt();

			if(E - A > K) {
				System.out.println(":(");
			} else {
				System.out.println("Yay!");
			}
		}
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		try (Scanner s = new Scanner(System.in)) {
			final int A = s.nextInt();
			s.nextInt();
			s.nextInt();
			s.nextInt();
			final int E = s.nextInt();
			final int K = s.nextInt();

			if(E - A > K) {
				System.out.println(":(");
			} else {
				System.out.println("Yay!");
			}
		}
	}
} Main public static void main(String[] args) {
		try (Scanner s = new Scanner(System.in)) {
			final int A = s.nextInt();
			s.nextInt();
			s.nextInt();
			s.nextInt();
			final int E = s.nextInt();
			final int K = s.nextInt();

			if(E - A > K) {
				System.out.println(":(");
			} else {
				System.out.println("Yay!");
			}
		}
	} main {
		try (Scanner s = new Scanner(System.in)) {
			final int A = s.nextInt();
			s.nextInt();
			s.nextInt();
			s.nextInt();
			final int E = s.nextInt();
			final int K = s.nextInt();

			if(E - A > K) {
				System.out.println(":(");
			} else {
				System.out.println("Yay!");
			}
		}
	} try (Scanner s = new Scanner(System.in)) {
			final int A = s.nextInt();
			s.nextInt();
			s.nextInt();
			s.nextInt();
			final int E = s.nextInt();
			final int K = s.nextInt();

			if(E - A > K) {
				System.out.println(":(");
			} else {
				System.out.println("Yay!");
			}
		} {
			final int A = s.nextInt();
			s.nextInt();
			s.nextInt();
			s.nextInt();
			final int E = s.nextInt();
			final int K = s.nextInt();

			if(E - A > K) {
				System.out.println(":(");
			} else {
				System.out.println("Yay!");
			}
		} Scanner s = new Scanner(System.in) Scanner s = new Scanner(System.in) new Scanner(System.in) final int A = s.nextInt(); A s.nextInt() s.nextInt s s.nextInt() s.nextInt s s.nextInt() s.nextInt s s.nextInt() s.nextInt s final int E = s.nextInt(); E s.nextInt() s.nextInt s final int K = s.nextInt(); K s.nextInt() s.nextInt s if(E - A > K) {
				System.out.println(":(");
			} else {
				System.out.println("Yay!");
			} E - A > K E - A E A K {
				System.out.println(":(");
			} System.out.println(":(") System.out.println System.out System System.out ":(" {
				System.out.println("Yay!");
			} System.out.println("Yay!") System.out.println System.out System System.out "Yay!" String[] args args public class Main {
	public static void main(String[] args) {
		try (Scanner s = new Scanner(System.in)) {
			final int A = s.nextInt();
			s.nextInt();
			s.nextInt();
			s.nextInt();
			final int E = s.nextInt();
			final int K = s.nextInt();

			if(E - A > K) {
				System.out.println(":(");
			} else {
				System.out.println("Yay!");
			}
		}
	}
} public class Main {
	public static void main(String[] args) {
		try (Scanner s = new Scanner(System.in)) {
			final int A = s.nextInt();
			s.nextInt();
			s.nextInt();
			s.nextInt();
			final int E = s.nextInt();
			final int K = s.nextInt();

			if(E - A > K) {
				System.out.println(":(");
			} else {
				System.out.println("Yay!");
			}
		}
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		try (Scanner s = new Scanner(System.in)) {
			final int A = s.nextInt();
			s.nextInt();
			s.nextInt();
			s.nextInt();
			final int E = s.nextInt();
			final int K = s.nextInt();

			if(E - A > K) {
				System.out.println(":(");
			} else {
				System.out.println("Yay!");
			}
		}
	}
}
