import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		int count = 0;

		if(b - a <= k) {
			if(c -a <= k) {
				if(d-a <= k) {
					if(e-a <= k) {
						if (c-b<=k) {
							if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							}
						}
					}
				}
			}
		}
		if(count == 0) {
			System.out.print(":(");
		}else {
			System.out.println("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 = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		int count = 0;

		if(b - a <= k) {
			if(c -a <= k) {
				if(d-a <= k) {
					if(e-a <= k) {
						if (c-b<=k) {
							if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							}
						}
					}
				}
			}
		}
		if(count == 0) {
			System.out.print(":(");
		}else {
			System.out.println("Yay!");
		}
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		int count = 0;

		if(b - a <= k) {
			if(c -a <= k) {
				if(d-a <= k) {
					if(e-a <= k) {
						if (c-b<=k) {
							if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							}
						}
					}
				}
			}
		}
		if(count == 0) {
			System.out.print(":(");
		}else {
			System.out.println("Yay!");
		}
	} main {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		int count = 0;

		if(b - a <= k) {
			if(c -a <= k) {
				if(d-a <= k) {
					if(e-a <= k) {
						if (c-b<=k) {
							if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							}
						}
					}
				}
			}
		}
		if(count == 0) {
			System.out.print(":(");
		}else {
			System.out.println("Yay!");
		}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int b = sc.nextInt(); b sc.nextInt() sc.nextInt sc int c = sc.nextInt(); c sc.nextInt() sc.nextInt sc int d = sc.nextInt(); d sc.nextInt() sc.nextInt sc int e = sc.nextInt(); e sc.nextInt() sc.nextInt sc int k = sc.nextInt(); k sc.nextInt() sc.nextInt sc int count = 0; count 0 if(b - a <= k) {
			if(c -a <= k) {
				if(d-a <= k) {
					if(e-a <= k) {
						if (c-b<=k) {
							if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							}
						}
					}
				}
			}
		} b - a <= k b - a b a k {
			if(c -a <= k) {
				if(d-a <= k) {
					if(e-a <= k) {
						if (c-b<=k) {
							if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							}
						}
					}
				}
			}
		} if(c -a <= k) {
				if(d-a <= k) {
					if(e-a <= k) {
						if (c-b<=k) {
							if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							}
						}
					}
				}
			} c -a <= k c -a c a k {
				if(d-a <= k) {
					if(e-a <= k) {
						if (c-b<=k) {
							if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							}
						}
					}
				}
			} if(d-a <= k) {
					if(e-a <= k) {
						if (c-b<=k) {
							if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							}
						}
					}
				} d-a <= k d-a d a k {
					if(e-a <= k) {
						if (c-b<=k) {
							if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							}
						}
					}
				} if(e-a <= k) {
						if (c-b<=k) {
							if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							}
						}
					} e-a <= k e-a e a k {
						if (c-b<=k) {
							if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							}
						}
					} if (c-b<=k) {
							if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							}
						} c-b<=k c-b c b k {
							if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							}
						} if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							} d-b <= k d-b d b k {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							} if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								} e-b <= k e-b e b k {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								} if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									} d-c<=k d-c d c k {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									} if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										} e-c<=k e-c e c k {
											if(e-d<=k) {
												count++;
											}
										} if(e-d<=k) {
												count++;
											} e-d<=k e-d e d k {
												count++;
											} count++ count if(count == 0) {
			System.out.print(":(");
		}else {
			System.out.println("Yay!");
		} count == 0 count 0 {
			System.out.print(":(");
		} System.out.print(":(") System.out.print 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 sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		int count = 0;

		if(b - a <= k) {
			if(c -a <= k) {
				if(d-a <= k) {
					if(e-a <= k) {
						if (c-b<=k) {
							if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							}
						}
					}
				}
			}
		}
		if(count == 0) {
			System.out.print(":(");
		}else {
			System.out.println("Yay!");
		}
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		int count = 0;

		if(b - a <= k) {
			if(c -a <= k) {
				if(d-a <= k) {
					if(e-a <= k) {
						if (c-b<=k) {
							if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							}
						}
					}
				}
			}
		}
		if(count == 0) {
			System.out.print(":(");
		}else {
			System.out.println("Yay!");
		}
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int d = sc.nextInt();
		int e = sc.nextInt();
		int k = sc.nextInt();

		int count = 0;

		if(b - a <= k) {
			if(c -a <= k) {
				if(d-a <= k) {
					if(e-a <= k) {
						if (c-b<=k) {
							if(d-b <= k) {
								if(e-b <= k) {
									if (d-c<=k) {
										if(e-c<=k) {
											if(e-d<=k) {
												count++;
											}
										}
									}
								}
							}
						}
					}
				}
			}
		}
		if(count == 0) {
			System.out.print(":(");
		}else {
			System.out.println("Yay!");
		}
	}
}
