import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] a = new int[6];
		for (int i = 0; i < 6; i++) {
			a[i] = sc.nextInt();
		}
		boolean s = true;
		for (int i = 0; i < 6; i++) {
			for (int j = i; j < 6; j++) {
				if (a[5] < Math.abs(a[i] - a[j])) {
					s = false;
					break;
				}
			}
		}
		System.out.println((s) ? "Yay!" : ":(");
	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] a = new int[6];
		for (int i = 0; i < 6; i++) {
			a[i] = sc.nextInt();
		}
		boolean s = true;
		for (int i = 0; i < 6; i++) {
			for (int j = i; j < 6; j++) {
				if (a[5] < Math.abs(a[i] - a[j])) {
					s = false;
					break;
				}
			}
		}
		System.out.println((s) ? "Yay!" : ":(");
	}

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] a = new int[6];
		for (int i = 0; i < 6; i++) {
			a[i] = sc.nextInt();
		}
		boolean s = true;
		for (int i = 0; i < 6; i++) {
			for (int j = i; j < 6; j++) {
				if (a[5] < Math.abs(a[i] - a[j])) {
					s = false;
					break;
				}
			}
		}
		System.out.println((s) ? "Yay!" : ":(");
	} main {
		Scanner sc = new Scanner(System.in);
		int[] a = new int[6];
		for (int i = 0; i < 6; i++) {
			a[i] = sc.nextInt();
		}
		boolean s = true;
		for (int i = 0; i < 6; i++) {
			for (int j = i; j < 6; j++) {
				if (a[5] < Math.abs(a[i] - a[j])) {
					s = false;
					break;
				}
			}
		}
		System.out.println((s) ? "Yay!" : ":(");
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] a = new int[6]; a new int[6] 6 for (int i = 0; i < 6; i++) {
			a[i] = sc.nextInt();
		} int i = 0; int i = 0; i 0 i < 6 i 6 i++ i++ i {
			a[i] = sc.nextInt();
		} {
			a[i] = sc.nextInt();
		} a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc boolean s = true; s true for (int i = 0; i < 6; i++) {
			for (int j = i; j < 6; j++) {
				if (a[5] < Math.abs(a[i] - a[j])) {
					s = false;
					break;
				}
			}
		} int i = 0; int i = 0; i 0 i < 6 i 6 i++ i++ i {
			for (int j = i; j < 6; j++) {
				if (a[5] < Math.abs(a[i] - a[j])) {
					s = false;
					break;
				}
			}
		} {
			for (int j = i; j < 6; j++) {
				if (a[5] < Math.abs(a[i] - a[j])) {
					s = false;
					break;
				}
			}
		} for (int j = i; j < 6; j++) {
				if (a[5] < Math.abs(a[i] - a[j])) {
					s = false;
					break;
				}
			} int j = i; int j = i; j i j < 6 j 6 j++ j++ j {
				if (a[5] < Math.abs(a[i] - a[j])) {
					s = false;
					break;
				}
			} {
				if (a[5] < Math.abs(a[i] - a[j])) {
					s = false;
					break;
				}
			} if (a[5] < Math.abs(a[i] - a[j])) {
					s = false;
					break;
				} a[5] < Math.abs(a[i] - a[j]) a[5] a 5 Math.abs(a[i] - a[j]) Math.abs Math a[i] - a[j] a[i] a i a[j] a j {
					s = false;
					break;
				} s = false s false break; System.out.println((s) ? "Yay!" : ":(") System.out.println System.out System System.out (s) ? "Yay!" : ":(" (s) "Yay!" ":(" String[] args args public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] a = new int[6];
		for (int i = 0; i < 6; i++) {
			a[i] = sc.nextInt();
		}
		boolean s = true;
		for (int i = 0; i < 6; i++) {
			for (int j = i; j < 6; j++) {
				if (a[5] < Math.abs(a[i] - a[j])) {
					s = false;
					break;
				}
			}
		}
		System.out.println((s) ? "Yay!" : ":(");
	}

} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] a = new int[6];
		for (int i = 0; i < 6; i++) {
			a[i] = sc.nextInt();
		}
		boolean s = true;
		for (int i = 0; i < 6; i++) {
			for (int j = i; j < 6; j++) {
				if (a[5] < Math.abs(a[i] - a[j])) {
					s = false;
					break;
				}
			}
		}
		System.out.println((s) ? "Yay!" : ":(");
	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] a = new int[6];
		for (int i = 0; i < 6; i++) {
			a[i] = sc.nextInt();
		}
		boolean s = true;
		for (int i = 0; i < 6; i++) {
			for (int j = i; j < 6; j++) {
				if (a[5] < Math.abs(a[i] - a[j])) {
					s = false;
					break;
				}
			}
		}
		System.out.println((s) ? "Yay!" : ":(");
	}

}
