import java.util.Scanner;

public class Main { 
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int firstAnt = 0;
		int lastAnt = 0;
		for(int i = 0;i<5;i++) {
			int tmp = Integer.parseInt(sc.nextLine());
			if(i == 0) {
				firstAnt = tmp;
			}else if(i == 4) {
				lastAnt = tmp;
			}
		}
		int allowedDistant = Integer.parseInt(sc.nextLine());
		String result = "";
		if((lastAnt - firstAnt) <= allowedDistant) {
			result = "Yay!"; 
		}else {
			result = ":(";
		}

		
		
		System.out.println(result);

		
		
		
	}
}
	
	 import java.util.Scanner; Scanner java.util public class Main { 
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int firstAnt = 0;
		int lastAnt = 0;
		for(int i = 0;i<5;i++) {
			int tmp = Integer.parseInt(sc.nextLine());
			if(i == 0) {
				firstAnt = tmp;
			}else if(i == 4) {
				lastAnt = tmp;
			}
		}
		int allowedDistant = Integer.parseInt(sc.nextLine());
		String result = "";
		if((lastAnt - firstAnt) <= allowedDistant) {
			result = "Yay!"; 
		}else {
			result = ":(";
		}

		
		
		System.out.println(result);

		
		
		
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int firstAnt = 0;
		int lastAnt = 0;
		for(int i = 0;i<5;i++) {
			int tmp = Integer.parseInt(sc.nextLine());
			if(i == 0) {
				firstAnt = tmp;
			}else if(i == 4) {
				lastAnt = tmp;
			}
		}
		int allowedDistant = Integer.parseInt(sc.nextLine());
		String result = "";
		if((lastAnt - firstAnt) <= allowedDistant) {
			result = "Yay!"; 
		}else {
			result = ":(";
		}

		
		
		System.out.println(result);

		
		
		
	} main {
		Scanner sc = new Scanner(System.in);
		int firstAnt = 0;
		int lastAnt = 0;
		for(int i = 0;i<5;i++) {
			int tmp = Integer.parseInt(sc.nextLine());
			if(i == 0) {
				firstAnt = tmp;
			}else if(i == 4) {
				lastAnt = tmp;
			}
		}
		int allowedDistant = Integer.parseInt(sc.nextLine());
		String result = "";
		if((lastAnt - firstAnt) <= allowedDistant) {
			result = "Yay!"; 
		}else {
			result = ":(";
		}

		
		
		System.out.println(result);

		
		
		
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int firstAnt = 0; firstAnt 0 int lastAnt = 0; lastAnt 0 for(int i = 0;i<5;i++) {
			int tmp = Integer.parseInt(sc.nextLine());
			if(i == 0) {
				firstAnt = tmp;
			}else if(i == 4) {
				lastAnt = tmp;
			}
		} int i = 0; int i = 0; i 0 i<5 i 5 i++ i++ i {
			int tmp = Integer.parseInt(sc.nextLine());
			if(i == 0) {
				firstAnt = tmp;
			}else if(i == 4) {
				lastAnt = tmp;
			}
		} {
			int tmp = Integer.parseInt(sc.nextLine());
			if(i == 0) {
				firstAnt = tmp;
			}else if(i == 4) {
				lastAnt = tmp;
			}
		} int tmp = Integer.parseInt(sc.nextLine()); tmp Integer.parseInt(sc.nextLine()) Integer.parseInt Integer sc.nextLine() sc.nextLine sc if(i == 0) {
				firstAnt = tmp;
			}else if(i == 4) {
				lastAnt = tmp;
			} i == 0 i 0 {
				firstAnt = tmp;
			} firstAnt = tmp firstAnt tmp if(i == 4) {
				lastAnt = tmp;
			} i == 4 i 4 {
				lastAnt = tmp;
			} lastAnt = tmp lastAnt tmp int allowedDistant = Integer.parseInt(sc.nextLine()); allowedDistant Integer.parseInt(sc.nextLine()) Integer.parseInt Integer sc.nextLine() sc.nextLine sc String result = ""; result "" if((lastAnt - firstAnt) <= allowedDistant) {
			result = "Yay!"; 
		}else {
			result = ":(";
		} (lastAnt - firstAnt) <= allowedDistant (lastAnt - firstAnt) lastAnt firstAnt allowedDistant {
			result = "Yay!"; 
		} result = "Yay!" result "Yay!" {
			result = ":(";
		} result = ":(" result ":(" System.out.println(result) System.out.println System.out System System.out result String[] args args public class Main { 
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int firstAnt = 0;
		int lastAnt = 0;
		for(int i = 0;i<5;i++) {
			int tmp = Integer.parseInt(sc.nextLine());
			if(i == 0) {
				firstAnt = tmp;
			}else if(i == 4) {
				lastAnt = tmp;
			}
		}
		int allowedDistant = Integer.parseInt(sc.nextLine());
		String result = "";
		if((lastAnt - firstAnt) <= allowedDistant) {
			result = "Yay!"; 
		}else {
			result = ":(";
		}

		
		
		System.out.println(result);

		
		
		
	}
} public class Main { 
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int firstAnt = 0;
		int lastAnt = 0;
		for(int i = 0;i<5;i++) {
			int tmp = Integer.parseInt(sc.nextLine());
			if(i == 0) {
				firstAnt = tmp;
			}else if(i == 4) {
				lastAnt = tmp;
			}
		}
		int allowedDistant = Integer.parseInt(sc.nextLine());
		String result = "";
		if((lastAnt - firstAnt) <= allowedDistant) {
			result = "Yay!"; 
		}else {
			result = ":(";
		}

		
		
		System.out.println(result);

		
		
		
	}
} Main
import java.util.Scanner;

public class Main { 
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int firstAnt = 0;
		int lastAnt = 0;
		for(int i = 0;i<5;i++) {
			int tmp = Integer.parseInt(sc.nextLine());
			if(i == 0) {
				firstAnt = tmp;
			}else if(i == 4) {
				lastAnt = tmp;
			}
		}
		int allowedDistant = Integer.parseInt(sc.nextLine());
		String result = "";
		if((lastAnt - firstAnt) <= allowedDistant) {
			result = "Yay!"; 
		}else {
			result = ":(";
		}

		
		
		System.out.println(result);

		
		
		
	}
}
	
	