import java.util.Scanner;

public class Main{

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int abcde[]=new int[5];
		for(int i=0;i<abcde.length;i++) {
			abcde[i]=scan.nextInt();
		}
		int k=scan.nextInt();
		scan.close();
		if(k<(abcde[abcde.length-1]-abcde[0]))System.out.println(":(");
		else System.out.println("Yay!");
	}
} import java.util.Scanner; Scanner java.util public class Main{

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int abcde[]=new int[5];
		for(int i=0;i<abcde.length;i++) {
			abcde[i]=scan.nextInt();
		}
		int k=scan.nextInt();
		scan.close();
		if(k<(abcde[abcde.length-1]-abcde[0]))System.out.println(":(");
		else System.out.println("Yay!");
	}
} Main public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int abcde[]=new int[5];
		for(int i=0;i<abcde.length;i++) {
			abcde[i]=scan.nextInt();
		}
		int k=scan.nextInt();
		scan.close();
		if(k<(abcde[abcde.length-1]-abcde[0]))System.out.println(":(");
		else System.out.println("Yay!");
	} main {
		Scanner scan = new Scanner(System.in);
		int abcde[]=new int[5];
		for(int i=0;i<abcde.length;i++) {
			abcde[i]=scan.nextInt();
		}
		int k=scan.nextInt();
		scan.close();
		if(k<(abcde[abcde.length-1]-abcde[0]))System.out.println(":(");
		else System.out.println("Yay!");
	} Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int abcde[]=new int[5]; abcde new int[5] 5 for(int i=0;i<abcde.length;i++) {
			abcde[i]=scan.nextInt();
		} int i=0; int i=0; i 0 i<abcde.length i abcde.length abcde abcde.length i++ i++ i {
			abcde[i]=scan.nextInt();
		} {
			abcde[i]=scan.nextInt();
		} abcde[i]=scan.nextInt() abcde[i] abcde i scan.nextInt() scan.nextInt scan int k=scan.nextInt(); k scan.nextInt() scan.nextInt scan scan.close() scan.close scan if(k<(abcde[abcde.length-1]-abcde[0]))System.out.println(":(");
		else System.out.println("Yay!"); k<(abcde[abcde.length-1]-abcde[0]) k (abcde[abcde.length-1]-abcde[0]) abcde[abcde.length-1] abcde abcde.length-1 abcde.length abcde abcde.length 1 abcde[0] abcde 0 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 scan = new Scanner(System.in);
		int abcde[]=new int[5];
		for(int i=0;i<abcde.length;i++) {
			abcde[i]=scan.nextInt();
		}
		int k=scan.nextInt();
		scan.close();
		if(k<(abcde[abcde.length-1]-abcde[0]))System.out.println(":(");
		else System.out.println("Yay!");
	}
} public class Main{

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int abcde[]=new int[5];
		for(int i=0;i<abcde.length;i++) {
			abcde[i]=scan.nextInt();
		}
		int k=scan.nextInt();
		scan.close();
		if(k<(abcde[abcde.length-1]-abcde[0]))System.out.println(":(");
		else System.out.println("Yay!");
	}
} Main
import java.util.Scanner;

public class Main{

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int abcde[]=new int[5];
		for(int i=0;i<abcde.length;i++) {
			abcde[i]=scan.nextInt();
		}
		int k=scan.nextInt();
		scan.close();
		if(k<(abcde[abcde.length-1]-abcde[0]))System.out.println(":(");
		else System.out.println("Yay!");
	}
}