import java.util.*;

public class Main {
	public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
      	int i, limit;
     	int[] distance = new int[5];
      	for(i = 0; i < 5; i++) distance[i] = Integer.parseInt(sc.next());
      	limit = Integer.parseInt(sc.next());
      	if(distance[4] - distance[0] > limit) System.out.println(":(");
      	else System.out.println("Yay!");
    }
} import java.util.*; util.* java public class Main {
	public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
      	int i, limit;
     	int[] distance = new int[5];
      	for(i = 0; i < 5; i++) distance[i] = Integer.parseInt(sc.next());
      	limit = Integer.parseInt(sc.next());
      	if(distance[4] - distance[0] > limit) System.out.println(":(");
      	else System.out.println("Yay!");
    }
} Main public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
      	int i, limit;
     	int[] distance = new int[5];
      	for(i = 0; i < 5; i++) distance[i] = Integer.parseInt(sc.next());
      	limit = Integer.parseInt(sc.next());
      	if(distance[4] - distance[0] > limit) System.out.println(":(");
      	else System.out.println("Yay!");
    } main {
    	Scanner sc = new Scanner(System.in);
      	int i, limit;
     	int[] distance = new int[5];
      	for(i = 0; i < 5; i++) distance[i] = Integer.parseInt(sc.next());
      	limit = Integer.parseInt(sc.next());
      	if(distance[4] - distance[0] > limit) System.out.println(":(");
      	else System.out.println("Yay!");
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int i i limit; limit int[] distance = new int[5]; distance new int[5] 5 for(i = 0; i < 5; i++) distance[i] = Integer.parseInt(sc.next()); i = 0; i = 0 i 0 i < 5 i 5 i++ i++ i distance[i] = Integer.parseInt(sc.next()); distance[i] = Integer.parseInt(sc.next()) distance[i] distance i Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc limit = Integer.parseInt(sc.next()) limit Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc if(distance[4] - distance[0] > limit) System.out.println(":(");
      	else System.out.println("Yay!"); distance[4] - distance[0] > limit distance[4] - distance[0] distance[4] distance 4 distance[0] distance 0 limit System.out.println(":(") System.out.println System.out System System.out ":(" System.out.println("Yay!") System.out.println System.out System System.out "Yay!" String[] args args public class Main {
	public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
      	int i, limit;
     	int[] distance = new int[5];
      	for(i = 0; i < 5; i++) distance[i] = Integer.parseInt(sc.next());
      	limit = Integer.parseInt(sc.next());
      	if(distance[4] - distance[0] > limit) System.out.println(":(");
      	else System.out.println("Yay!");
    }
} public class Main {
	public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
      	int i, limit;
     	int[] distance = new int[5];
      	for(i = 0; i < 5; i++) distance[i] = Integer.parseInt(sc.next());
      	limit = Integer.parseInt(sc.next());
      	if(distance[4] - distance[0] > limit) System.out.println(":(");
      	else System.out.println("Yay!");
    }
} Main
import java.util.*;

public class Main {
	public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
      	int i, limit;
     	int[] distance = new int[5];
      	for(i = 0; i < 5; i++) distance[i] = Integer.parseInt(sc.next());
      	limit = Integer.parseInt(sc.next());
      	if(distance[4] - distance[0] > limit) System.out.println(":(");
      	else System.out.println("Yay!");
    }
}
