import java.util.Scanner;

public class Main {
	public static final String OK = "Yay!";
	public static final String NO = ":(";
	public static void main(final String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] abcde = new int[5];
		abcde[0] = sc.nextInt();
		abcde[1] = sc.nextInt();
		abcde[2] = sc.nextInt();
		abcde[3] = sc.nextInt();
		abcde[4] = sc.nextInt();
		int k = sc.nextInt();
		sc.close();
		for(int i = 0; i < 5; i++) {
			int idx = i;
			for(int j = 0; j < 5; j++) {
				int p = abcde[idx];
				int q = abcde[j];
				if(i != j && Math.abs(p - q) > k) {
					System.out.println(NO);
					return;
				}
			}
		}
		System.out.println(OK);
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static final String OK = "Yay!";
	public static final String NO = ":(";
	public static void main(final String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] abcde = new int[5];
		abcde[0] = sc.nextInt();
		abcde[1] = sc.nextInt();
		abcde[2] = sc.nextInt();
		abcde[3] = sc.nextInt();
		abcde[4] = sc.nextInt();
		int k = sc.nextInt();
		sc.close();
		for(int i = 0; i < 5; i++) {
			int idx = i;
			for(int j = 0; j < 5; j++) {
				int p = abcde[idx];
				int q = abcde[j];
				if(i != j && Math.abs(p - q) > k) {
					System.out.println(NO);
					return;
				}
			}
		}
		System.out.println(OK);
	}
} Main public static final String OK = "Yay!"; OK "Yay!" public static final String NO = ":("; NO ":(" public static void main(final String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] abcde = new int[5];
		abcde[0] = sc.nextInt();
		abcde[1] = sc.nextInt();
		abcde[2] = sc.nextInt();
		abcde[3] = sc.nextInt();
		abcde[4] = sc.nextInt();
		int k = sc.nextInt();
		sc.close();
		for(int i = 0; i < 5; i++) {
			int idx = i;
			for(int j = 0; j < 5; j++) {
				int p = abcde[idx];
				int q = abcde[j];
				if(i != j && Math.abs(p - q) > k) {
					System.out.println(NO);
					return;
				}
			}
		}
		System.out.println(OK);
	} main {
		Scanner sc = new Scanner(System.in);
		int[] abcde = new int[5];
		abcde[0] = sc.nextInt();
		abcde[1] = sc.nextInt();
		abcde[2] = sc.nextInt();
		abcde[3] = sc.nextInt();
		abcde[4] = sc.nextInt();
		int k = sc.nextInt();
		sc.close();
		for(int i = 0; i < 5; i++) {
			int idx = i;
			for(int j = 0; j < 5; j++) {
				int p = abcde[idx];
				int q = abcde[j];
				if(i != j && Math.abs(p - q) > k) {
					System.out.println(NO);
					return;
				}
			}
		}
		System.out.println(OK);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] abcde = new int[5]; abcde new int[5] 5 abcde[0] = sc.nextInt() abcde[0] abcde 0 sc.nextInt() sc.nextInt sc abcde[1] = sc.nextInt() abcde[1] abcde 1 sc.nextInt() sc.nextInt sc abcde[2] = sc.nextInt() abcde[2] abcde 2 sc.nextInt() sc.nextInt sc abcde[3] = sc.nextInt() abcde[3] abcde 3 sc.nextInt() sc.nextInt sc abcde[4] = sc.nextInt() abcde[4] abcde 4 sc.nextInt() sc.nextInt sc int k = sc.nextInt(); k sc.nextInt() sc.nextInt sc sc.close() sc.close sc for(int i = 0; i < 5; i++) {
			int idx = i;
			for(int j = 0; j < 5; j++) {
				int p = abcde[idx];
				int q = abcde[j];
				if(i != j && Math.abs(p - q) > k) {
					System.out.println(NO);
					return;
				}
			}
		} int i = 0; int i = 0; i 0 i < 5 i 5 i++ i++ i {
			int idx = i;
			for(int j = 0; j < 5; j++) {
				int p = abcde[idx];
				int q = abcde[j];
				if(i != j && Math.abs(p - q) > k) {
					System.out.println(NO);
					return;
				}
			}
		} {
			int idx = i;
			for(int j = 0; j < 5; j++) {
				int p = abcde[idx];
				int q = abcde[j];
				if(i != j && Math.abs(p - q) > k) {
					System.out.println(NO);
					return;
				}
			}
		} int idx = i; idx i for(int j = 0; j < 5; j++) {
				int p = abcde[idx];
				int q = abcde[j];
				if(i != j && Math.abs(p - q) > k) {
					System.out.println(NO);
					return;
				}
			} int j = 0; int j = 0; j 0 j < 5 j 5 j++ j++ j {
				int p = abcde[idx];
				int q = abcde[j];
				if(i != j && Math.abs(p - q) > k) {
					System.out.println(NO);
					return;
				}
			} {
				int p = abcde[idx];
				int q = abcde[j];
				if(i != j && Math.abs(p - q) > k) {
					System.out.println(NO);
					return;
				}
			} int p = abcde[idx]; p abcde[idx] abcde idx int q = abcde[j]; q abcde[j] abcde j if(i != j && Math.abs(p - q) > k) {
					System.out.println(NO);
					return;
				} i != j && Math.abs(p - q) > k i != j i j Math.abs(p - q) > k Math.abs(p - q) Math.abs Math p - q p q k {
					System.out.println(NO);
					return;
				} System.out.println(NO) System.out.println System.out System System.out NO return; System.out.println(OK) System.out.println System.out System System.out OK final String[] args args public class Main {
	public static final String OK = "Yay!";
	public static final String NO = ":(";
	public static void main(final String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] abcde = new int[5];
		abcde[0] = sc.nextInt();
		abcde[1] = sc.nextInt();
		abcde[2] = sc.nextInt();
		abcde[3] = sc.nextInt();
		abcde[4] = sc.nextInt();
		int k = sc.nextInt();
		sc.close();
		for(int i = 0; i < 5; i++) {
			int idx = i;
			for(int j = 0; j < 5; j++) {
				int p = abcde[idx];
				int q = abcde[j];
				if(i != j && Math.abs(p - q) > k) {
					System.out.println(NO);
					return;
				}
			}
		}
		System.out.println(OK);
	}
} public class Main {
	public static final String OK = "Yay!";
	public static final String NO = ":(";
	public static void main(final String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] abcde = new int[5];
		abcde[0] = sc.nextInt();
		abcde[1] = sc.nextInt();
		abcde[2] = sc.nextInt();
		abcde[3] = sc.nextInt();
		abcde[4] = sc.nextInt();
		int k = sc.nextInt();
		sc.close();
		for(int i = 0; i < 5; i++) {
			int idx = i;
			for(int j = 0; j < 5; j++) {
				int p = abcde[idx];
				int q = abcde[j];
				if(i != j && Math.abs(p - q) > k) {
					System.out.println(NO);
					return;
				}
			}
		}
		System.out.println(OK);
	}
} Main
import java.util.Scanner;

public class Main {
	public static final String OK = "Yay!";
	public static final String NO = ":(";
	public static void main(final String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] abcde = new int[5];
		abcde[0] = sc.nextInt();
		abcde[1] = sc.nextInt();
		abcde[2] = sc.nextInt();
		abcde[3] = sc.nextInt();
		abcde[4] = sc.nextInt();
		int k = sc.nextInt();
		sc.close();
		for(int i = 0; i < 5; i++) {
			int idx = i;
			for(int j = 0; j < 5; j++) {
				int p = abcde[idx];
				int q = abcde[j];
				if(i != j && Math.abs(p - q) > k) {
					System.out.println(NO);
					return;
				}
			}
		}
		System.out.println(OK);
	}
}