import java.io.PrintWriter;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        try (InputReader in = new InputReader(); PrintWriter out = new PrintWriter(System.out)) {
            new Main().solve(in, out);
            out.flush();
        }
    }

    private void solve(InputReader in, PrintWriter out) {
        int min = in.nextInt();
        in.nextInt();
        in.nextInt();
        in.nextInt();
        int max = in.nextInt();
        int k = in.nextInt();
        out.println((max - min) > k ? ":(" : "Yay!");
    }
}

class InputReader implements AutoCloseable {
    private final Scanner sc = new Scanner(System.in);

    String next() {
        return this.sc.next();
    }

    int nextInt() {
        return Integer.parseInt(this.sc.next());
    }

    long nextLong() {
        return Long.parseLong(this.sc.next());
    }

    double nextDouble() {
        return Double.parseDouble(this.sc.next());
    }

    @Override
    public void close() {
        this.sc.close();
    }
} import java.io.PrintWriter; PrintWriter java.io import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        try (InputReader in = new InputReader(); PrintWriter out = new PrintWriter(System.out)) {
            new Main().solve(in, out);
            out.flush();
        }
    }

    private void solve(InputReader in, PrintWriter out) {
        int min = in.nextInt();
        in.nextInt();
        in.nextInt();
        in.nextInt();
        int max = in.nextInt();
        int k = in.nextInt();
        out.println((max - min) > k ? ":(" : "Yay!");
    }
} Main public static void main(String[] args) {
        try (InputReader in = new InputReader(); PrintWriter out = new PrintWriter(System.out)) {
            new Main().solve(in, out);
            out.flush();
        }
    } main {
        try (InputReader in = new InputReader(); PrintWriter out = new PrintWriter(System.out)) {
            new Main().solve(in, out);
            out.flush();
        }
    } try (InputReader in = new InputReader(); PrintWriter out = new PrintWriter(System.out)) {
            new Main().solve(in, out);
            out.flush();
        } {
            new Main().solve(in, out);
            out.flush();
        } InputReader in = new InputReader() InputReader in = new InputReader() new InputReader() PrintWriter out = new PrintWriter(System.out) PrintWriter out = new PrintWriter(System.out) new PrintWriter(System.out) new Main().solve(in, out) new Main().solve new Main() in out out.flush() out.flush out String[] args args private void solve(InputReader in, PrintWriter out) {
        int min = in.nextInt();
        in.nextInt();
        in.nextInt();
        in.nextInt();
        int max = in.nextInt();
        int k = in.nextInt();
        out.println((max - min) > k ? ":(" : "Yay!");
    } solve {
        int min = in.nextInt();
        in.nextInt();
        in.nextInt();
        in.nextInt();
        int max = in.nextInt();
        int k = in.nextInt();
        out.println((max - min) > k ? ":(" : "Yay!");
    } int min = in.nextInt(); min in.nextInt() in.nextInt in in.nextInt() in.nextInt in in.nextInt() in.nextInt in in.nextInt() in.nextInt in int max = in.nextInt(); max in.nextInt() in.nextInt in int k = in.nextInt(); k in.nextInt() in.nextInt in out.println((max - min) > k ? ":(" : "Yay!") out.println out (max - min) > k ? ":(" : "Yay!" (max - min) > k (max - min) max min k ":(" "Yay!" InputReader in in PrintWriter out out class InputReader implements AutoCloseable {
    private final Scanner sc = new Scanner(System.in);

    String next() {
        return this.sc.next();
    }

    int nextInt() {
        return Integer.parseInt(this.sc.next());
    }

    long nextLong() {
        return Long.parseLong(this.sc.next());
    }

    double nextDouble() {
        return Double.parseDouble(this.sc.next());
    }

    @Override
    public void close() {
        this.sc.close();
    }
} InputReader private final Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String next() {
        return this.sc.next();
    } next {
        return this.sc.next();
    } return this.sc.next(); this.sc.next() this.sc.next this.sc this this.sc int nextInt() {
        return Integer.parseInt(this.sc.next());
    } nextInt {
        return Integer.parseInt(this.sc.next());
    } return Integer.parseInt(this.sc.next()); Integer.parseInt(this.sc.next()) Integer.parseInt Integer this.sc.next() this.sc.next this.sc this this.sc long nextLong() {
        return Long.parseLong(this.sc.next());
    } nextLong {
        return Long.parseLong(this.sc.next());
    } return Long.parseLong(this.sc.next()); Long.parseLong(this.sc.next()) Long.parseLong Long this.sc.next() this.sc.next this.sc this this.sc double nextDouble() {
        return Double.parseDouble(this.sc.next());
    } nextDouble {
        return Double.parseDouble(this.sc.next());
    } return Double.parseDouble(this.sc.next()); Double.parseDouble(this.sc.next()) Double.parseDouble Double this.sc.next() this.sc.next this.sc this this.sc @Override
    public void close() {
        this.sc.close();
    } close {
        this.sc.close();
    } this.sc.close() this.sc.close this.sc this this.sc AutoCloseable public class Main {
    public static void main(String[] args) {
        try (InputReader in = new InputReader(); PrintWriter out = new PrintWriter(System.out)) {
            new Main().solve(in, out);
            out.flush();
        }
    }

    private void solve(InputReader in, PrintWriter out) {
        int min = in.nextInt();
        in.nextInt();
        in.nextInt();
        in.nextInt();
        int max = in.nextInt();
        int k = in.nextInt();
        out.println((max - min) > k ? ":(" : "Yay!");
    }
} public class Main {
    public static void main(String[] args) {
        try (InputReader in = new InputReader(); PrintWriter out = new PrintWriter(System.out)) {
            new Main().solve(in, out);
            out.flush();
        }
    }

    private void solve(InputReader in, PrintWriter out) {
        int min = in.nextInt();
        in.nextInt();
        in.nextInt();
        in.nextInt();
        int max = in.nextInt();
        int k = in.nextInt();
        out.println((max - min) > k ? ":(" : "Yay!");
    }
} Main
import java.io.PrintWriter;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        try (InputReader in = new InputReader(); PrintWriter out = new PrintWriter(System.out)) {
            new Main().solve(in, out);
            out.flush();
        }
    }

    private void solve(InputReader in, PrintWriter out) {
        int min = in.nextInt();
        in.nextInt();
        in.nextInt();
        in.nextInt();
        int max = in.nextInt();
        int k = in.nextInt();
        out.println((max - min) > k ? ":(" : "Yay!");
    }
}

class InputReader implements AutoCloseable {
    private final Scanner sc = new Scanner(System.in);

    String next() {
        return this.sc.next();
    }

    int nextInt() {
        return Integer.parseInt(this.sc.next());
    }

    long nextLong() {
        return Long.parseLong(this.sc.next());
    }

    double nextDouble() {
        return Double.parseDouble(this.sc.next());
    }

    @Override
    public void close() {
        this.sc.close();
    }
}
