import java.util.Scanner;

public class Main {
	public static final String OK = "Yay!";
	public static final String NO = ":(";
	public static void main(final 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();
		sc.close();
		if(e - a > k) System.out.println(NO);
		else System.out.println(OK);
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static final String OK = "Yay!";
	public static final String NO = ":(";
	public static void main(final 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();
		sc.close();
		if(e - a > k) System.out.println(NO);
		else System.out.println(OK);
	}
} Main public static final String OK = "Yay!"; OK "Yay!" public static final String NO = ":("; NO ":(" public static void main(final 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();
		sc.close();
		if(e - a > k) System.out.println(NO);
		else System.out.println(OK);
	} 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();
		sc.close();
		if(e - a > k) System.out.println(NO);
		else System.out.println(OK);
	} 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 sc.close() sc.close sc if(e - a > k) System.out.println(NO);
		else System.out.println(OK); e - a > k e - a e a k System.out.println(NO) System.out.println System.out System System.out NO System.out.println(OK) System.out.println System.out System System.out OK final String[] args args public class Main {
	public static final String OK = "Yay!";
	public static final String NO = ":(";
	public static void main(final 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();
		sc.close();
		if(e - a > k) System.out.println(NO);
		else System.out.println(OK);
	}
} public class Main {
	public static final String OK = "Yay!";
	public static final String NO = ":(";
	public static void main(final 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();
		sc.close();
		if(e - a > k) System.out.println(NO);
		else System.out.println(OK);
	}
} Main
import java.util.Scanner;

public class Main {
	public static final String OK = "Yay!";
	public static final String NO = ":(";
	public static void main(final 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();
		sc.close();
		if(e - a > k) System.out.println(NO);
		else System.out.println(OK);
	}
}