import java.util.Scanner;

public class Main{

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

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

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

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

public class Main{

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