import java.util.Scanner;

public class Main {

    private static final String YES = "Yay!";
    private static final String NO = ":(";

    public static String process(int a, int b, int c, int d, int e, int k) {
        return ((e - a) <= k) ? YES : NO;
    }

    // Util func

    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();

        final String result = process(a, b, c, d, e, k);

        output(result);
    }

    private static void output(String result) {
        System.out.println(result);
    }
} import java.util.Scanner; Scanner java.util public class Main {

    private static final String YES = "Yay!";
    private static final String NO = ":(";

    public static String process(int a, int b, int c, int d, int e, int k) {
        return ((e - a) <= k) ? YES : NO;
    }

    // Util func

    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();

        final String result = process(a, b, c, d, e, k);

        output(result);
    }

    private static void output(String result) {
        System.out.println(result);
    }
} Main private static final String YES = "Yay!"; YES "Yay!" private static final String NO = ":("; NO ":(" public static String process(int a, int b, int c, int d, int e, int k) {
        return ((e - a) <= k) ? YES : NO;
    } process {
        return ((e - a) <= k) ? YES : NO;
    } return ((e - a) <= k) ? YES : NO; ((e - a) <= k) ? YES : NO ((e - a) <= k) (e - a) e a k YES NO int a a int b b int c c int d d int e e int k k 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();

        final String result = process(a, b, c, d, e, k);

        output(result);
    } 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();

        final String result = process(a, b, c, d, e, k);

        output(result);
    } 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 final String result = process(a, b, c, d, e, k); result process(a, b, c, d, e, k) process a b c d e k output(result) output result String[] args args private static void output(String result) {
        System.out.println(result);
    } output {
        System.out.println(result);
    } System.out.println(result) System.out.println System.out System System.out result String result result public class Main {

    private static final String YES = "Yay!";
    private static final String NO = ":(";

    public static String process(int a, int b, int c, int d, int e, int k) {
        return ((e - a) <= k) ? YES : NO;
    }

    // Util func

    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();

        final String result = process(a, b, c, d, e, k);

        output(result);
    }

    private static void output(String result) {
        System.out.println(result);
    }
} public class Main {

    private static final String YES = "Yay!";
    private static final String NO = ":(";

    public static String process(int a, int b, int c, int d, int e, int k) {
        return ((e - a) <= k) ? YES : NO;
    }

    // Util func

    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();

        final String result = process(a, b, c, d, e, k);

        output(result);
    }

    private static void output(String result) {
        System.out.println(result);
    }
} Main
import java.util.Scanner;

public class Main {

    private static final String YES = "Yay!";
    private static final String NO = ":(";

    public static String process(int a, int b, int c, int d, int e, int k) {
        return ((e - a) <= k) ? YES : NO;
    }

    // Util func

    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();

        final String result = process(a, b, c, d, e, k);

        output(result);
    }

    private static void output(String result) {
        System.out.println(result);
    }
}
