import java.util.Scanner;

public class Main {

  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    
    int[] a = new int[5];
        
    for (int i = 0; i < 5; i++) {
    	a[i] = scan.nextInt();
    }
    
    int k = scan.nextInt();
    
    if (a[4] - a[0] > k) {
    	System.out.print(":(");
    } else {
    	System.out.print("Yay!");
    }
  }
} import java.util.Scanner; Scanner java.util public class Main {

  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    
    int[] a = new int[5];
        
    for (int i = 0; i < 5; i++) {
    	a[i] = scan.nextInt();
    }
    
    int k = scan.nextInt();
    
    if (a[4] - a[0] > k) {
    	System.out.print(":(");
    } else {
    	System.out.print("Yay!");
    }
  }
} Main public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    
    int[] a = new int[5];
        
    for (int i = 0; i < 5; i++) {
    	a[i] = scan.nextInt();
    }
    
    int k = scan.nextInt();
    
    if (a[4] - a[0] > k) {
    	System.out.print(":(");
    } else {
    	System.out.print("Yay!");
    }
  } main {
    Scanner scan = new Scanner(System.in);
    
    int[] a = new int[5];
        
    for (int i = 0; i < 5; i++) {
    	a[i] = scan.nextInt();
    }
    
    int k = scan.nextInt();
    
    if (a[4] - a[0] > k) {
    	System.out.print(":(");
    } else {
    	System.out.print("Yay!");
    }
  } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int[] a = new int[5]; a new int[5] 5 for (int i = 0; i < 5; i++) {
    	a[i] = scan.nextInt();
    } int i = 0; int i = 0; i 0 i < 5 i 5 i++ i++ i {
    	a[i] = scan.nextInt();
    } {
    	a[i] = scan.nextInt();
    } a[i] = scan.nextInt() a[i] a i scan.nextInt() scan.nextInt scan int k = scan.nextInt(); k scan.nextInt() scan.nextInt scan if (a[4] - a[0] > k) {
    	System.out.print(":(");
    } else {
    	System.out.print("Yay!");
    } a[4] - a[0] > k a[4] - a[0] a[4] a 4 a[0] a 0 k {
    	System.out.print(":(");
    } System.out.print(":(") System.out.print System.out System System.out ":(" {
    	System.out.print("Yay!");
    } System.out.print("Yay!") System.out.print System.out System System.out "Yay!" String[] args args public class Main {

  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    
    int[] a = new int[5];
        
    for (int i = 0; i < 5; i++) {
    	a[i] = scan.nextInt();
    }
    
    int k = scan.nextInt();
    
    if (a[4] - a[0] > k) {
    	System.out.print(":(");
    } else {
    	System.out.print("Yay!");
    }
  }
} public class Main {

  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    
    int[] a = new int[5];
        
    for (int i = 0; i < 5; i++) {
    	a[i] = scan.nextInt();
    }
    
    int k = scan.nextInt();
    
    if (a[4] - a[0] > k) {
    	System.out.print(":(");
    } else {
    	System.out.print("Yay!");
    }
  }
} Main
import java.util.Scanner;

public class Main {

  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    
    int[] a = new int[5];
        
    for (int i = 0; i < 5; i++) {
    	a[i] = scan.nextInt();
    }
    
    int k = scan.nextInt();
    
    if (a[4] - a[0] > k) {
    	System.out.print(":(");
    } else {
    	System.out.print("Yay!");
    }
  }
}
