import java.util.Scanner;

// A - Five Antennas
public class Main {
	static int[] arr;
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		arr = new int[5];
		for (int i = 0; i < 5; i++) {
			arr[i] = sc.nextInt();
		}
		int k = sc.nextInt();
		System.out.println(check(k));

	}
	static String check(int k) {
		for (int i = 0; i < 5; i++) {
			for (int j = 0; j < 5; j++) {
				int x = Math.abs(arr[i] - arr[j]);
				if (k < x) {
					return ":(";
				}
			}
		}
		return "Yay!";
	}
} import java.util.Scanner; Scanner java.util public class Main {
	static int[] arr;
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		arr = new int[5];
		for (int i = 0; i < 5; i++) {
			arr[i] = sc.nextInt();
		}
		int k = sc.nextInt();
		System.out.println(check(k));

	}
	static String check(int k) {
		for (int i = 0; i < 5; i++) {
			for (int j = 0; j < 5; j++) {
				int x = Math.abs(arr[i] - arr[j]);
				if (k < x) {
					return ":(";
				}
			}
		}
		return "Yay!";
	}
} Main static int[] arr; arr public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		arr = new int[5];
		for (int i = 0; i < 5; i++) {
			arr[i] = sc.nextInt();
		}
		int k = sc.nextInt();
		System.out.println(check(k));

	} main {
		Scanner sc = new Scanner(System.in);
		arr = new int[5];
		for (int i = 0; i < 5; i++) {
			arr[i] = sc.nextInt();
		}
		int k = sc.nextInt();
		System.out.println(check(k));

	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) arr = new int[5] arr new int[5] 5 for (int i = 0; i < 5; i++) {
			arr[i] = sc.nextInt();
		} int i = 0; int i = 0; i 0 i < 5 i 5 i++ i++ i {
			arr[i] = sc.nextInt();
		} {
			arr[i] = sc.nextInt();
		} arr[i] = sc.nextInt() arr[i] arr i sc.nextInt() sc.nextInt sc int k = sc.nextInt(); k sc.nextInt() sc.nextInt sc System.out.println(check(k)) System.out.println System.out System System.out check(k) check k String[] args args static String check(int k) {
		for (int i = 0; i < 5; i++) {
			for (int j = 0; j < 5; j++) {
				int x = Math.abs(arr[i] - arr[j]);
				if (k < x) {
					return ":(";
				}
			}
		}
		return "Yay!";
	} check {
		for (int i = 0; i < 5; i++) {
			for (int j = 0; j < 5; j++) {
				int x = Math.abs(arr[i] - arr[j]);
				if (k < x) {
					return ":(";
				}
			}
		}
		return "Yay!";
	} for (int i = 0; i < 5; i++) {
			for (int j = 0; j < 5; j++) {
				int x = Math.abs(arr[i] - arr[j]);
				if (k < x) {
					return ":(";
				}
			}
		} int i = 0; int i = 0; i 0 i < 5 i 5 i++ i++ i {
			for (int j = 0; j < 5; j++) {
				int x = Math.abs(arr[i] - arr[j]);
				if (k < x) {
					return ":(";
				}
			}
		} {
			for (int j = 0; j < 5; j++) {
				int x = Math.abs(arr[i] - arr[j]);
				if (k < x) {
					return ":(";
				}
			}
		} for (int j = 0; j < 5; j++) {
				int x = Math.abs(arr[i] - arr[j]);
				if (k < x) {
					return ":(";
				}
			} int j = 0; int j = 0; j 0 j < 5 j 5 j++ j++ j {
				int x = Math.abs(arr[i] - arr[j]);
				if (k < x) {
					return ":(";
				}
			} {
				int x = Math.abs(arr[i] - arr[j]);
				if (k < x) {
					return ":(";
				}
			} int x = Math.abs(arr[i] - arr[j]); x Math.abs(arr[i] - arr[j]) Math.abs Math arr[i] - arr[j] arr[i] arr i arr[j] arr j if (k < x) {
					return ":(";
				} k < x k x {
					return ":(";
				} return ":("; ":(" return "Yay!"; "Yay!" int k k public class Main {
	static int[] arr;
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		arr = new int[5];
		for (int i = 0; i < 5; i++) {
			arr[i] = sc.nextInt();
		}
		int k = sc.nextInt();
		System.out.println(check(k));

	}
	static String check(int k) {
		for (int i = 0; i < 5; i++) {
			for (int j = 0; j < 5; j++) {
				int x = Math.abs(arr[i] - arr[j]);
				if (k < x) {
					return ":(";
				}
			}
		}
		return "Yay!";
	}
} public class Main {
	static int[] arr;
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		arr = new int[5];
		for (int i = 0; i < 5; i++) {
			arr[i] = sc.nextInt();
		}
		int k = sc.nextInt();
		System.out.println(check(k));

	}
	static String check(int k) {
		for (int i = 0; i < 5; i++) {
			for (int j = 0; j < 5; j++) {
				int x = Math.abs(arr[i] - arr[j]);
				if (k < x) {
					return ":(";
				}
			}
		}
		return "Yay!";
	}
} Main
import java.util.Scanner;

// A - Five Antennas
public class Main {
	static int[] arr;
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		arr = new int[5];
		for (int i = 0; i < 5; i++) {
			arr[i] = sc.nextInt();
		}
		int k = sc.nextInt();
		System.out.println(check(k));

	}
	static String check(int k) {
		for (int i = 0; i < 5; i++) {
			for (int j = 0; j < 5; j++) {
				int x = Math.abs(arr[i] - arr[j]);
				if (k < x) {
					return ":(";
				}
			}
		}
		return "Yay!";
	}
}
