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