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 k = sc.nextInt();
        int max = A[4] - A[0];
        if (max <= k) System.out.println("Yay!");
        else System.out.println(":(");
        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 k = sc.nextInt();
        int max = A[4] - A[0];
        if (max <= k) System.out.println("Yay!");
        else System.out.println(":(");
        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 k = sc.nextInt();
        int max = A[4] - A[0];
        if (max <= k) System.out.println("Yay!");
        else System.out.println(":(");
        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 k = sc.nextInt();
        int max = A[4] - A[0];
        if (max <= k) System.out.println("Yay!");
        else System.out.println(":(");
        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 k = sc.nextInt(); k sc.nextInt() sc.nextInt sc int max = A[4] - A[0]; max A[4] - A[0] A[4] A 4 A[0] A 0 if (max <= k) System.out.println("Yay!");
        else System.out.println(":("); max <= k max k System.out.println("Yay!") System.out.println System.out System System.out "Yay!" System.out.println(":(") System.out.println System.out System System.out ":(" 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 k = sc.nextInt();
        int max = A[4] - A[0];
        if (max <= k) System.out.println("Yay!");
        else System.out.println(":(");
        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 k = sc.nextInt();
        int max = A[4] - A[0];
        if (max <= k) System.out.println("Yay!");
        else System.out.println(":(");
        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 k = sc.nextInt();
        int max = A[4] - A[0];
        if (max <= k) System.out.println("Yay!");
        else System.out.println(":(");
        sc.close();
    }
}