import java.util.*;

public class Main {
 
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[5];
        for (int i = 0; i<5; i++) {
            a[i] = sc.nextInt();
        }
        int th = sc.nextInt();

        int diff = a[4] - a[0];

        if (diff > th) {
        System.out.println(":(");
        sc.close();
        }
        else {
        System.out.println("Yay!");
        sc.close();

        }

       sc.close();
    }
} import java.util.*; util.* java public class Main {
 
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[5];
        for (int i = 0; i<5; i++) {
            a[i] = sc.nextInt();
        }
        int th = sc.nextInt();

        int diff = a[4] - a[0];

        if (diff > th) {
        System.out.println(":(");
        sc.close();
        }
        else {
        System.out.println("Yay!");
        sc.close();

        }

       sc.close();
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[5];
        for (int i = 0; i<5; i++) {
            a[i] = sc.nextInt();
        }
        int th = sc.nextInt();

        int diff = a[4] - a[0];

        if (diff > th) {
        System.out.println(":(");
        sc.close();
        }
        else {
        System.out.println("Yay!");
        sc.close();

        }

       sc.close();
    } main {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[5];
        for (int i = 0; i<5; i++) {
            a[i] = sc.nextInt();
        }
        int th = sc.nextInt();

        int diff = a[4] - a[0];

        if (diff > th) {
        System.out.println(":(");
        sc.close();
        }
        else {
        System.out.println("Yay!");
        sc.close();

        }

       sc.close();
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] a = new int[5]; a new int[5] 5 for (int i = 0; i<5; i++) {
            a[i] = sc.nextInt();
        } int i = 0; int i = 0; i 0 i<5 i 5 i++ i++ i {
            a[i] = sc.nextInt();
        } {
            a[i] = sc.nextInt();
        } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc int th = sc.nextInt(); th sc.nextInt() sc.nextInt sc int diff = a[4] - a[0]; diff a[4] - a[0] a[4] a 4 a[0] a 0 if (diff > th) {
        System.out.println(":(");
        sc.close();
        }
        else {
        System.out.println("Yay!");
        sc.close();

        } diff > th diff th {
        System.out.println(":(");
        sc.close();
        } System.out.println(":(") System.out.println System.out System System.out ":(" sc.close() sc.close sc {
        System.out.println("Yay!");
        sc.close();

        } System.out.println("Yay!") System.out.println System.out System System.out "Yay!" sc.close() sc.close sc sc.close() sc.close sc String[] args args public class Main {
 
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[5];
        for (int i = 0; i<5; i++) {
            a[i] = sc.nextInt();
        }
        int th = sc.nextInt();

        int diff = a[4] - a[0];

        if (diff > th) {
        System.out.println(":(");
        sc.close();
        }
        else {
        System.out.println("Yay!");
        sc.close();

        }

       sc.close();
    }
} public class Main {
 
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[5];
        for (int i = 0; i<5; i++) {
            a[i] = sc.nextInt();
        }
        int th = sc.nextInt();

        int diff = a[4] - a[0];

        if (diff > th) {
        System.out.println(":(");
        sc.close();
        }
        else {
        System.out.println("Yay!");
        sc.close();

        }

       sc.close();
    }
} Main
import java.util.*;

public class Main {
 
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[5];
        for (int i = 0; i<5; i++) {
            a[i] = sc.nextInt();
        }
        int th = sc.nextInt();

        int diff = a[4] - a[0];

        if (diff > th) {
        System.out.println(":(");
        sc.close();
        }
        else {
        System.out.println("Yay!");
        sc.close();

        }

       sc.close();
    }
}