import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner scan = new Scanner(System.in);

        int num = 0;
        int min = 0;
        int max = 0;
        min = scan.nextInt();
        scan.nextInt();
        scan.nextInt();
        scan.nextInt();
        max = scan.nextInt();
        int k = scan.nextInt();
        
        if ((max - min) > k){
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        }
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        Scanner scan = new Scanner(System.in);

        int num = 0;
        int min = 0;
        int max = 0;
        min = scan.nextInt();
        scan.nextInt();
        scan.nextInt();
        scan.nextInt();
        max = scan.nextInt();
        int k = scan.nextInt();
        
        if ((max - min) > k){
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        }
    }
} Main public static void main(String[] args) throws Exception {
        Scanner scan = new Scanner(System.in);

        int num = 0;
        int min = 0;
        int max = 0;
        min = scan.nextInt();
        scan.nextInt();
        scan.nextInt();
        scan.nextInt();
        max = scan.nextInt();
        int k = scan.nextInt();
        
        if ((max - min) > k){
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        }
    } main {
        Scanner scan = new Scanner(System.in);

        int num = 0;
        int min = 0;
        int max = 0;
        min = scan.nextInt();
        scan.nextInt();
        scan.nextInt();
        scan.nextInt();
        max = scan.nextInt();
        int k = scan.nextInt();
        
        if ((max - min) > k){
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        }
    } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int num = 0; num 0 int min = 0; min 0 int max = 0; max 0 min = scan.nextInt() min scan.nextInt() scan.nextInt scan scan.nextInt() scan.nextInt scan scan.nextInt() scan.nextInt scan scan.nextInt() scan.nextInt scan max = scan.nextInt() max scan.nextInt() scan.nextInt scan int k = scan.nextInt(); k scan.nextInt() scan.nextInt scan if ((max - min) > k){
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        } (max - min) > k (max - min) max min 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) throws Exception {
        Scanner scan = new Scanner(System.in);

        int num = 0;
        int min = 0;
        int max = 0;
        min = scan.nextInt();
        scan.nextInt();
        scan.nextInt();
        scan.nextInt();
        max = scan.nextInt();
        int k = scan.nextInt();
        
        if ((max - min) > k){
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        }
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        Scanner scan = new Scanner(System.in);

        int num = 0;
        int min = 0;
        int max = 0;
        min = scan.nextInt();
        scan.nextInt();
        scan.nextInt();
        scan.nextInt();
        max = scan.nextInt();
        int k = scan.nextInt();
        
        if ((max - min) > k){
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        }
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner scan = new Scanner(System.in);

        int num = 0;
        int min = 0;
        int max = 0;
        min = scan.nextInt();
        scan.nextInt();
        scan.nextInt();
        scan.nextInt();
        max = scan.nextInt();
        int k = scan.nextInt();
        
        if ((max - min) > k){
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        }
    }
}