import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner sca = new Scanner(System.in);
		int a = sca.nextInt(),b = sca.nextInt(),c = sca.nextInt(),d = sca.nextInt(),e = sca.nextInt(),k = sca.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) {
		Scanner sca = new Scanner(System.in);
		int a = sca.nextInt(),b = sca.nextInt(),c = sca.nextInt(),d = sca.nextInt(),e = sca.nextInt(),k = sca.nextInt();
		if(e - a > k) System.out.println(":(");
		else System.out.println("Yay!");
	}
} Main public static void main(String[] args) {
		Scanner sca = new Scanner(System.in);
		int a = sca.nextInt(),b = sca.nextInt(),c = sca.nextInt(),d = sca.nextInt(),e = sca.nextInt(),k = sca.nextInt();
		if(e - a > k) System.out.println(":(");
		else System.out.println("Yay!");
	} main {
		Scanner sca = new Scanner(System.in);
		int a = sca.nextInt(),b = sca.nextInt(),c = sca.nextInt(),d = sca.nextInt(),e = sca.nextInt(),k = sca.nextInt();
		if(e - a > k) System.out.println(":(");
		else System.out.println("Yay!");
	} Scanner sca = new Scanner(System.in); sca new Scanner(System.in) int a = sca.nextInt() a sca.nextInt() sca.nextInt sca b = sca.nextInt() b sca.nextInt() sca.nextInt sca c = sca.nextInt() c sca.nextInt() sca.nextInt sca d = sca.nextInt() d sca.nextInt() sca.nextInt sca e = sca.nextInt() e sca.nextInt() sca.nextInt sca k = sca.nextInt(); k sca.nextInt() sca.nextInt sca 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 System System.out ":(" 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) {
		Scanner sca = new Scanner(System.in);
		int a = sca.nextInt(),b = sca.nextInt(),c = sca.nextInt(),d = sca.nextInt(),e = sca.nextInt(),k = sca.nextInt();
		if(e - a > k) System.out.println(":(");
		else System.out.println("Yay!");
	}
} public class Main {

	public static void main(String[] args) {
		Scanner sca = new Scanner(System.in);
		int a = sca.nextInt(),b = sca.nextInt(),c = sca.nextInt(),d = sca.nextInt(),e = sca.nextInt(),k = sca.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) {
		Scanner sca = new Scanner(System.in);
		int a = sca.nextInt(),b = sca.nextInt(),c = sca.nextInt(),d = sca.nextInt(),e = sca.nextInt(),k = sca.nextInt();
		if(e - a > k) System.out.println(":(");
		else System.out.println("Yay!");
	}
}
