import java.util.*;

class Main {
  public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    ArrayList<Integer> list = new ArrayList<>();
    for (int i = 0; i < 5; i++) {
      list.add(Integer.parseInt(scanner.nextLine()));
    }
    int a = list.get(0);
    int e = list.get(4);
    int k = Integer.parseInt(scanner.nextLine());
    if (e -a > k) {
      System.out.println(":(");
    }
    else {
      System.out.println("Yay!");
    }
  }
} import java.util.*; util.* java class Main {
  public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    ArrayList<Integer> list = new ArrayList<>();
    for (int i = 0; i < 5; i++) {
      list.add(Integer.parseInt(scanner.nextLine()));
    }
    int a = list.get(0);
    int e = list.get(4);
    int k = Integer.parseInt(scanner.nextLine());
    if (e -a > k) {
      System.out.println(":(");
    }
    else {
      System.out.println("Yay!");
    }
  }
} Main public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    ArrayList<Integer> list = new ArrayList<>();
    for (int i = 0; i < 5; i++) {
      list.add(Integer.parseInt(scanner.nextLine()));
    }
    int a = list.get(0);
    int e = list.get(4);
    int k = Integer.parseInt(scanner.nextLine());
    if (e -a > k) {
      System.out.println(":(");
    }
    else {
      System.out.println("Yay!");
    }
  } main {
    Scanner scanner = new Scanner(System.in);
    ArrayList<Integer> list = new ArrayList<>();
    for (int i = 0; i < 5; i++) {
      list.add(Integer.parseInt(scanner.nextLine()));
    }
    int a = list.get(0);
    int e = list.get(4);
    int k = Integer.parseInt(scanner.nextLine());
    if (e -a > k) {
      System.out.println(":(");
    }
    else {
      System.out.println("Yay!");
    }
  } Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) ArrayList<Integer> list = new ArrayList<>(); list new ArrayList<>() for (int i = 0; i < 5; i++) {
      list.add(Integer.parseInt(scanner.nextLine()));
    } int i = 0; int i = 0; i 0 i < 5 i 5 i++ i++ i {
      list.add(Integer.parseInt(scanner.nextLine()));
    } {
      list.add(Integer.parseInt(scanner.nextLine()));
    } list.add(Integer.parseInt(scanner.nextLine())) list.add list Integer.parseInt(scanner.nextLine()) Integer.parseInt Integer scanner.nextLine() scanner.nextLine scanner int a = list.get(0); a list.get(0) list.get list 0 int e = list.get(4); e list.get(4) list.get list 4 int k = Integer.parseInt(scanner.nextLine()); k Integer.parseInt(scanner.nextLine()) Integer.parseInt Integer scanner.nextLine() scanner.nextLine scanner 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
import java.util.*;

class Main {
  public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    ArrayList<Integer> list = new ArrayList<>();
    for (int i = 0; i < 5; i++) {
      list.add(Integer.parseInt(scanner.nextLine()));
    }
    int a = list.get(0);
    int e = list.get(4);
    int k = Integer.parseInt(scanner.nextLine());
    if (e -a > k) {
      System.out.println(":(");
    }
    else {
      System.out.println("Yay!");
    }
  }
}