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(solve(a, b, c, d, e, k));

        sc.close();
    }

    static String solve(int a, int b, int c, int d, int e, int k) {
        return (e - a <= k) ? "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(solve(a, b, c, d, e, k));

        sc.close();
    }

    static String solve(int a, int b, int c, int d, int e, int k) {
        return (e - a <= k) ? "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(solve(a, b, c, d, e, k));

        sc.close();
    } 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(solve(a, b, c, d, e, k));

        sc.close();
    } 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(solve(a, b, c, d, e, k)) System.out.println System.out System System.out solve(a, b, c, d, e, k) solve a b c d e k sc.close() sc.close sc String[] args args static String solve(int a, int b, int c, int d, int e, int k) {
        return (e - a <= k) ? "Yay!" : ":(";
    } solve {
        return (e - a <= k) ? "Yay!" : ":(";
    } return (e - a <= k) ? "Yay!" : ":("; (e - a <= k) ? "Yay!" : ":(" (e - a <= k) e - a e a k "Yay!" ":(" int a a int b b int c c int d d int e e int k k 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(solve(a, b, c, d, e, k));

        sc.close();
    }

    static String solve(int a, int b, int c, int d, int e, int k) {
        return (e - a <= k) ? "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(solve(a, b, c, d, e, k));

        sc.close();
    }

    static String solve(int a, int b, int c, int d, int e, int k) {
        return (e - a <= k) ? "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(solve(a, b, c, d, e, k));

        sc.close();
    }

    static String solve(int a, int b, int c, int d, int e, int k) {
        return (e - a <= k) ? "Yay!" : ":(";
    }
}