import java.util.Scanner;

public class Main {

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

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

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

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

public class Main {

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