import java.util.*;
import java.util.HashSet;
import java.util.Map;
import java.util.HashMap;
import java.util.ArrayList;
import java.util.List;
import java.util.Arrays;
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();

        if (e - a > k) {
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        }
    }
} import java.util.*; util.* java import java.util.HashSet; HashSet java.util import java.util.Map; Map java.util import java.util.HashMap; HashMap java.util import java.util.ArrayList; ArrayList java.util import java.util.List; List java.util import java.util.Arrays; Arrays java.util 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();

        if (e - a > k) {
            System.out.println(":(");
        } else {
            System.out.println("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();

        if (e - a > k) {
            System.out.println(":(");
        } else {
            System.out.println("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();

        if (e - a > k) {
            System.out.println(":(");
        } else {
            System.out.println("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 if (e - a > k) {
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        } e - a > k e - a e a k {
            System.out.println(":(");
        } System.out.println(":(") System.out.println System.out System System.out ":(" {
            System.out.println("Yay!");
        } System.out.println("Yay!") System.out.println System.out System System.out "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();

        if (e - a > k) {
            System.out.println(":(");
        } else {
            System.out.println("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();

        if (e - a > k) {
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        }
    }
} Main
import java.util.*;
import java.util.HashSet;
import java.util.Map;
import java.util.HashMap;
import java.util.ArrayList;
import java.util.List;
import java.util.Arrays;
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();

        if (e - a > k) {
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        }
    }
}
