import java.util.*;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long point[] = new long[5];
		for(int i = 0; i < 5; i ++) {
			point[i] = sc.nextLong();
		}
		System.out.println(point[4] - point[0] > sc.nextLong() ? ":(" : "Yay!");
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long point[] = new long[5];
		for(int i = 0; i < 5; i ++) {
			point[i] = sc.nextLong();
		}
		System.out.println(point[4] - point[0] > sc.nextLong() ? ":(" : "Yay!");
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long point[] = new long[5];
		for(int i = 0; i < 5; i ++) {
			point[i] = sc.nextLong();
		}
		System.out.println(point[4] - point[0] > sc.nextLong() ? ":(" : "Yay!");
	} main {
		Scanner sc = new Scanner(System.in);
		long point[] = new long[5];
		for(int i = 0; i < 5; i ++) {
			point[i] = sc.nextLong();
		}
		System.out.println(point[4] - point[0] > sc.nextLong() ? ":(" : "Yay!");
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) long point[] = new long[5]; point new long[5] 5 for(int i = 0; i < 5; i ++) {
			point[i] = sc.nextLong();
		} int i = 0; int i = 0; i 0 i < 5 i 5 i ++ i ++ i {
			point[i] = sc.nextLong();
		} {
			point[i] = sc.nextLong();
		} point[i] = sc.nextLong() point[i] point i sc.nextLong() sc.nextLong sc System.out.println(point[4] - point[0] > sc.nextLong() ? ":(" : "Yay!") System.out.println System.out System System.out point[4] - point[0] > sc.nextLong() ? ":(" : "Yay!" point[4] - point[0] > sc.nextLong() point[4] - point[0] point[4] point 4 point[0] point 0 sc.nextLong() sc.nextLong sc ":(" "Yay!" String[] args args public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long point[] = new long[5];
		for(int i = 0; i < 5; i ++) {
			point[i] = sc.nextLong();
		}
		System.out.println(point[4] - point[0] > sc.nextLong() ? ":(" : "Yay!");
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long point[] = new long[5];
		for(int i = 0; i < 5; i ++) {
			point[i] = sc.nextLong();
		}
		System.out.println(point[4] - point[0] > sc.nextLong() ? ":(" : "Yay!");
	}
} Main
import java.util.*;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long point[] = new long[5];
		for(int i = 0; i < 5; i ++) {
			point[i] = sc.nextLong();
		}
		System.out.println(point[4] - point[0] > sc.nextLong() ? ":(" : "Yay!");
	}
}