import java.util.Scanner;

public class Main {

	public static void main(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();

		System.out.println(k>=e-a ? "Yay!" : ":(");

	}
} 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();
		int B = sc.nextInt();
		int C = sc.nextInt();
		int D = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		System.out.println(k>=e-a ? "Yay!" : ":(");

	}
} Main public static void main(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();

		System.out.println(k>=e-a ? "Yay!" : ":(");

	} 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();

		System.out.println(k>=e-a ? "Yay!" : ":(");

	} 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 System.out.println(k>=e-a ? "Yay!" : ":(") System.out.println System.out System System.out k>=e-a ? "Yay!" : ":(" k>=e-a k e-a e a "Yay!" ":(" String[] args args public class Main {

	public static void main(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();

		System.out.println(k>=e-a ? "Yay!" : ":(");

	}
} public class Main {

	public static void main(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();

		System.out.println(k>=e-a ? "Yay!" : ":(");

	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(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();

		System.out.println(k>=e-a ? "Yay!" : ":(");

	}
}