import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int v[] = new int[5];
    for (int i = 0; i < 5; i++) v[i] = sc.nextInt();
    int k = sc.nextInt();
    System.out.println((v[4] - v[0] <= k) ? "Yay!" : ":(");
  }
} import java.util.*; util.* java public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int v[] = new int[5];
    for (int i = 0; i < 5; i++) v[i] = sc.nextInt();
    int k = sc.nextInt();
    System.out.println((v[4] - v[0] <= k) ? "Yay!" : ":(");
  }
} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int v[] = new int[5];
    for (int i = 0; i < 5; i++) v[i] = sc.nextInt();
    int k = sc.nextInt();
    System.out.println((v[4] - v[0] <= k) ? "Yay!" : ":(");
  } main {
    Scanner sc = new Scanner(System.in);
    int v[] = new int[5];
    for (int i = 0; i < 5; i++) v[i] = sc.nextInt();
    int k = sc.nextInt();
    System.out.println((v[4] - v[0] <= k) ? "Yay!" : ":(");
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int v[] = new int[5]; v new int[5] 5 for (int i = 0; i < 5; i++) v[i] = sc.nextInt(); int i = 0; int i = 0; i 0 i < 5 i 5 i++ i++ i v[i] = sc.nextInt(); v[i] = sc.nextInt() v[i] v i sc.nextInt() sc.nextInt sc int k = sc.nextInt(); k sc.nextInt() sc.nextInt sc System.out.println((v[4] - v[0] <= k) ? "Yay!" : ":(") System.out.println System.out System System.out (v[4] - v[0] <= k) ? "Yay!" : ":(" (v[4] - v[0] <= k) v[4] - v[0] v[4] v 4 v[0] v 0 k "Yay!" ":(" String[] args args public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int v[] = new int[5];
    for (int i = 0; i < 5; i++) v[i] = sc.nextInt();
    int k = sc.nextInt();
    System.out.println((v[4] - v[0] <= k) ? "Yay!" : ":(");
  }
} public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int v[] = new int[5];
    for (int i = 0; i < 5; i++) v[i] = sc.nextInt();
    int k = sc.nextInt();
    System.out.println((v[4] - v[0] <= k) ? "Yay!" : ":(");
  }
} Main
import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int v[] = new int[5];
    for (int i = 0; i < 5; i++) v[i] = sc.nextInt();
    int k = sc.nextInt();
    System.out.println((v[4] - v[0] <= k) ? "Yay!" : ":(");
  }
}