import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		
		Scanner scanner = new Scanner(System.in);
		int count = 0;
		int X[] = new int[5];
		int d = 0;
		
		for (int i = 0; i < 5; i++) {
			int x = scanner.nextInt();
			X[i] = x;
		}
		int k = scanner.nextInt();
		
		for (int m = 4; m > 0; m--) {
			for (int n = 0; n < m; n++) {
				d = X[m] - X[n];
				//System.out.println(d);
			if (d > k) {
				count += 1;
			}
			}
		}
		//System.out.println("countは"+count);
		if (count != 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 scanner = new Scanner(System.in);
		int count = 0;
		int X[] = new int[5];
		int d = 0;
		
		for (int i = 0; i < 5; i++) {
			int x = scanner.nextInt();
			X[i] = x;
		}
		int k = scanner.nextInt();
		
		for (int m = 4; m > 0; m--) {
			for (int n = 0; n < m; n++) {
				d = X[m] - X[n];
				//System.out.println(d);
			if (d > k) {
				count += 1;
			}
			}
		}
		//System.out.println("countは"+count);
		if (count != 0) {
			System.out.println(":(");
		} else {
			System.out.println("Yay!");
		}
	}
} Main public static void main(String[] args) {
		
		Scanner scanner = new Scanner(System.in);
		int count = 0;
		int X[] = new int[5];
		int d = 0;
		
		for (int i = 0; i < 5; i++) {
			int x = scanner.nextInt();
			X[i] = x;
		}
		int k = scanner.nextInt();
		
		for (int m = 4; m > 0; m--) {
			for (int n = 0; n < m; n++) {
				d = X[m] - X[n];
				//System.out.println(d);
			if (d > k) {
				count += 1;
			}
			}
		}
		//System.out.println("countは"+count);
		if (count != 0) {
			System.out.println(":(");
		} else {
			System.out.println("Yay!");
		}
	} main {
		
		Scanner scanner = new Scanner(System.in);
		int count = 0;
		int X[] = new int[5];
		int d = 0;
		
		for (int i = 0; i < 5; i++) {
			int x = scanner.nextInt();
			X[i] = x;
		}
		int k = scanner.nextInt();
		
		for (int m = 4; m > 0; m--) {
			for (int n = 0; n < m; n++) {
				d = X[m] - X[n];
				//System.out.println(d);
			if (d > k) {
				count += 1;
			}
			}
		}
		//System.out.println("countは"+count);
		if (count != 0) {
			System.out.println(":(");
		} else {
			System.out.println("Yay!");
		}
	} Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) int count = 0; count 0 int X[] = new int[5]; X new int[5] 5 int d = 0; d 0 for (int i = 0; i < 5; i++) {
			int x = scanner.nextInt();
			X[i] = x;
		} int i = 0; int i = 0; i 0 i < 5 i 5 i++ i++ i {
			int x = scanner.nextInt();
			X[i] = x;
		} {
			int x = scanner.nextInt();
			X[i] = x;
		} int x = scanner.nextInt(); x scanner.nextInt() scanner.nextInt scanner X[i] = x X[i] X i x int k = scanner.nextInt(); k scanner.nextInt() scanner.nextInt scanner for (int m = 4; m > 0; m--) {
			for (int n = 0; n < m; n++) {
				d = X[m] - X[n];
				//System.out.println(d);
			if (d > k) {
				count += 1;
			}
			}
		} int m = 4; int m = 4; m 4 m > 0 m 0 m-- m-- m {
			for (int n = 0; n < m; n++) {
				d = X[m] - X[n];
				//System.out.println(d);
			if (d > k) {
				count += 1;
			}
			}
		} {
			for (int n = 0; n < m; n++) {
				d = X[m] - X[n];
				//System.out.println(d);
			if (d > k) {
				count += 1;
			}
			}
		} for (int n = 0; n < m; n++) {
				d = X[m] - X[n];
				//System.out.println(d);
			if (d > k) {
				count += 1;
			}
			} int n = 0; int n = 0; n 0 n < m n m n++ n++ n {
				d = X[m] - X[n];
				//System.out.println(d);
			if (d > k) {
				count += 1;
			}
			} {
				d = X[m] - X[n];
				//System.out.println(d);
			if (d > k) {
				count += 1;
			}
			} d = X[m] - X[n] d X[m] - X[n] X[m] X m X[n] X n if (d > k) {
				count += 1;
			} d > k d k {
				count += 1;
			} count += 1 count 1 if (count != 0) {
			System.out.println(":(");
		} else {
			System.out.println("Yay!");
		} count != 0 count 0 {
			System.out.println(":(");
		} System.out.println(":(") System.out.println System.out System System.out ":(" {
			System.out.println("Yay!");
		} 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 scanner = new Scanner(System.in);
		int count = 0;
		int X[] = new int[5];
		int d = 0;
		
		for (int i = 0; i < 5; i++) {
			int x = scanner.nextInt();
			X[i] = x;
		}
		int k = scanner.nextInt();
		
		for (int m = 4; m > 0; m--) {
			for (int n = 0; n < m; n++) {
				d = X[m] - X[n];
				//System.out.println(d);
			if (d > k) {
				count += 1;
			}
			}
		}
		//System.out.println("countは"+count);
		if (count != 0) {
			System.out.println(":(");
		} else {
			System.out.println("Yay!");
		}
	}
} public class Main {
	public static void main(String[] args) {
		
		Scanner scanner = new Scanner(System.in);
		int count = 0;
		int X[] = new int[5];
		int d = 0;
		
		for (int i = 0; i < 5; i++) {
			int x = scanner.nextInt();
			X[i] = x;
		}
		int k = scanner.nextInt();
		
		for (int m = 4; m > 0; m--) {
			for (int n = 0; n < m; n++) {
				d = X[m] - X[n];
				//System.out.println(d);
			if (d > k) {
				count += 1;
			}
			}
		}
		//System.out.println("countは"+count);
		if (count != 0) {
			System.out.println(":(");
		} else {
			System.out.println("Yay!");
		}
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		
		Scanner scanner = new Scanner(System.in);
		int count = 0;
		int X[] = new int[5];
		int d = 0;
		
		for (int i = 0; i < 5; i++) {
			int x = scanner.nextInt();
			X[i] = x;
		}
		int k = scanner.nextInt();
		
		for (int m = 4; m > 0; m--) {
			for (int n = 0; n < m; n++) {
				d = X[m] - X[n];
				//System.out.println(d);
			if (d > k) {
				count += 1;
			}
			}
		}
		//System.out.println("countは"+count);
		if (count != 0) {
			System.out.println(":(");
		} else {
			System.out.println("Yay!");
		}
	}
}
