import java.io.InputStream;
import java.io.PrintStream;
import java.util.Scanner;

public class Main {
	InputStream in = System.in;
	PrintStream out = System.out;

	public void _main(String[] args) {
		Scanner sc = new Scanner(in);

		int[] a = new int[5];
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		}
		int k = sc.nextInt();

		if (a[4] - a[0] <= k) {
			out.println("Yay!");
		} else {
			out.println(":(");
		}

		sc.close();

	}

	public static void main(String[] args) {
		new Main()._main(args);
	}

} import java.io.InputStream; InputStream java.io import java.io.PrintStream; PrintStream java.io import java.util.Scanner; Scanner java.util public class Main {
	InputStream in = System.in;
	PrintStream out = System.out;

	public void _main(String[] args) {
		Scanner sc = new Scanner(in);

		int[] a = new int[5];
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		}
		int k = sc.nextInt();

		if (a[4] - a[0] <= k) {
			out.println("Yay!");
		} else {
			out.println(":(");
		}

		sc.close();

	}

	public static void main(String[] args) {
		new Main()._main(args);
	}

} Main InputStream in = System.in; in System.in System System.in PrintStream out = System.out; out System.out System System.out public void _main(String[] args) {
		Scanner sc = new Scanner(in);

		int[] a = new int[5];
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		}
		int k = sc.nextInt();

		if (a[4] - a[0] <= k) {
			out.println("Yay!");
		} else {
			out.println(":(");
		}

		sc.close();

	} _main {
		Scanner sc = new Scanner(in);

		int[] a = new int[5];
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		}
		int k = sc.nextInt();

		if (a[4] - a[0] <= k) {
			out.println("Yay!");
		} else {
			out.println(":(");
		}

		sc.close();

	} Scanner sc = new Scanner(in); sc new Scanner(in) int[] a = new int[5]; a new int[5] 5 for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		} int i = 0; int i = 0; i 0 i < a.length i a.length a a.length i++ i++ i {
			a[i] = sc.nextInt();
		} {
			a[i] = sc.nextInt();
		} a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc int k = sc.nextInt(); k sc.nextInt() sc.nextInt sc if (a[4] - a[0] <= k) {
			out.println("Yay!");
		} else {
			out.println(":(");
		} a[4] - a[0] <= k a[4] - a[0] a[4] a 4 a[0] a 0 k {
			out.println("Yay!");
		} out.println("Yay!") out.println out "Yay!" {
			out.println(":(");
		} out.println(":(") out.println out ":(" sc.close() sc.close sc String[] args args public static void main(String[] args) {
		new Main()._main(args);
	} main {
		new Main()._main(args);
	} new Main()._main(args) new Main()._main new Main() args String[] args args public class Main {
	InputStream in = System.in;
	PrintStream out = System.out;

	public void _main(String[] args) {
		Scanner sc = new Scanner(in);

		int[] a = new int[5];
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		}
		int k = sc.nextInt();

		if (a[4] - a[0] <= k) {
			out.println("Yay!");
		} else {
			out.println(":(");
		}

		sc.close();

	}

	public static void main(String[] args) {
		new Main()._main(args);
	}

} public class Main {
	InputStream in = System.in;
	PrintStream out = System.out;

	public void _main(String[] args) {
		Scanner sc = new Scanner(in);

		int[] a = new int[5];
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		}
		int k = sc.nextInt();

		if (a[4] - a[0] <= k) {
			out.println("Yay!");
		} else {
			out.println(":(");
		}

		sc.close();

	}

	public static void main(String[] args) {
		new Main()._main(args);
	}

} Main
import java.io.InputStream;
import java.io.PrintStream;
import java.util.Scanner;

public class Main {
	InputStream in = System.in;
	PrintStream out = System.out;

	public void _main(String[] args) {
		Scanner sc = new Scanner(in);

		int[] a = new int[5];
		for (int i = 0; i < a.length; i++) {
			a[i] = sc.nextInt();
		}
		int k = sc.nextInt();

		if (a[4] - a[0] <= k) {
			out.println("Yay!");
		} else {
			out.println(":(");
		}

		sc.close();

	}

	public static void main(String[] args) {
		new Main()._main(args);
	}

}
