import java.util.Scanner;
public class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] an = new int[5];
		for(int i = 0; i < 5; i++) {
			an[i] = sc.nextInt();
		}
		int k = sc.nextInt();
		String ans = ":(";
		sc.close();
		if (an[4] - an[0] <= k) {
			ans = "Yay!";
		}
		System.out.println(ans);
	}
} import java.util.Scanner; Scanner java.util public class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] an = new int[5];
		for(int i = 0; i < 5; i++) {
			an[i] = sc.nextInt();
		}
		int k = sc.nextInt();
		String ans = ":(";
		sc.close();
		if (an[4] - an[0] <= k) {
			ans = "Yay!";
		}
		System.out.println(ans);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] an = new int[5];
		for(int i = 0; i < 5; i++) {
			an[i] = sc.nextInt();
		}
		int k = sc.nextInt();
		String ans = ":(";
		sc.close();
		if (an[4] - an[0] <= k) {
			ans = "Yay!";
		}
		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int[] an = new int[5];
		for(int i = 0; i < 5; i++) {
			an[i] = sc.nextInt();
		}
		int k = sc.nextInt();
		String ans = ":(";
		sc.close();
		if (an[4] - an[0] <= k) {
			ans = "Yay!";
		}
		System.out.println(ans);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] an = new int[5]; an new int[5] 5 for(int i = 0; i < 5; i++) {
			an[i] = sc.nextInt();
		} int i = 0; int i = 0; i 0 i < 5 i 5 i++ i++ i {
			an[i] = sc.nextInt();
		} {
			an[i] = sc.nextInt();
		} an[i] = sc.nextInt() an[i] an i sc.nextInt() sc.nextInt sc int k = sc.nextInt(); k sc.nextInt() sc.nextInt sc String ans = ":("; ans ":(" sc.close() sc.close sc if (an[4] - an[0] <= k) {
			ans = "Yay!";
		} an[4] - an[0] <= k an[4] - an[0] an[4] an 4 an[0] an 0 k {
			ans = "Yay!";
		} ans = "Yay!" ans "Yay!" System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] an = new int[5];
		for(int i = 0; i < 5; i++) {
			an[i] = sc.nextInt();
		}
		int k = sc.nextInt();
		String ans = ":(";
		sc.close();
		if (an[4] - an[0] <= k) {
			ans = "Yay!";
		}
		System.out.println(ans);
	}
} public class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] an = new int[5];
		for(int i = 0; i < 5; i++) {
			an[i] = sc.nextInt();
		}
		int k = sc.nextInt();
		String ans = ":(";
		sc.close();
		if (an[4] - an[0] <= k) {
			ans = "Yay!";
		}
		System.out.println(ans);
	}
} Main
import java.util.Scanner;
public class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] an = new int[5];
		for(int i = 0; i < 5; i++) {
			an[i] = sc.nextInt();
		}
		int k = sc.nextInt();
		String ans = ":(";
		sc.close();
		if (an[4] - an[0] <= k) {
			ans = "Yay!";
		}
		System.out.println(ans);
	}
}