import java.util.Scanner;

public 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 s = (e -a <= k) ? "Yay!" : ":(" ;
		System.out.println(s);
	}

} 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();
		sc.nextInt();
		sc.nextInt();
		sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();
		String s = (e -a <= k) ? "Yay!" : ":(" ;
		System.out.println(s);
	}

} 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 s = (e -a <= k) ? "Yay!" : ":(" ;
		System.out.println(s);
	} 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 s = (e -a <= k) ? "Yay!" : ":(" ;
		System.out.println(s);
	} 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 s = (e -a <= k) ? "Yay!" : ":(" ; s (e -a <= k) ? "Yay!" : ":(" (e -a <= k) e -a e a k "Yay!" ":(" System.out.println(s) System.out.println System.out System System.out s String[] args args public 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 s = (e -a <= k) ? "Yay!" : ":(" ;
		System.out.println(s);
	}

} public 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 s = (e -a <= k) ? "Yay!" : ":(" ;
		System.out.println(s);
	}

} Main
import java.util.Scanner;

public 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 s = (e -a <= k) ? "Yay!" : ":(" ;
		System.out.println(s);
	}

}
