
import java.io.BufferedReader;
import java.io.InputStreamReader;

class Main {

	public static void main(String[] args) throws Exception {
		int antenna[] = new int[5];
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		for(int i=0; i<antenna.length; i++) {
			antenna[i] = Integer.parseInt(br.readLine());
		}
		int k = Integer.parseInt(br.readLine());

		if(antenna[4] -antenna[0] > k) {
			System.out.println(":(");
		}else {
			System.out.println("Yay!");
		}
	}

} import java.io.BufferedReader; BufferedReader java.io import java.io.InputStreamReader; InputStreamReader java.io class Main {

	public static void main(String[] args) throws Exception {
		int antenna[] = new int[5];
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		for(int i=0; i<antenna.length; i++) {
			antenna[i] = Integer.parseInt(br.readLine());
		}
		int k = Integer.parseInt(br.readLine());

		if(antenna[4] -antenna[0] > k) {
			System.out.println(":(");
		}else {
			System.out.println("Yay!");
		}
	}

} Main public static void main(String[] args) throws Exception {
		int antenna[] = new int[5];
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		for(int i=0; i<antenna.length; i++) {
			antenna[i] = Integer.parseInt(br.readLine());
		}
		int k = Integer.parseInt(br.readLine());

		if(antenna[4] -antenna[0] > k) {
			System.out.println(":(");
		}else {
			System.out.println("Yay!");
		}
	} main {
		int antenna[] = new int[5];
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		for(int i=0; i<antenna.length; i++) {
			antenna[i] = Integer.parseInt(br.readLine());
		}
		int k = Integer.parseInt(br.readLine());

		if(antenna[4] -antenna[0] > k) {
			System.out.println(":(");
		}else {
			System.out.println("Yay!");
		}
	} int antenna[] = new int[5]; antenna new int[5] 5 BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) for(int i=0; i<antenna.length; i++) {
			antenna[i] = Integer.parseInt(br.readLine());
		} int i=0; int i=0; i 0 i<antenna.length i antenna.length antenna antenna.length i++ i++ i {
			antenna[i] = Integer.parseInt(br.readLine());
		} {
			antenna[i] = Integer.parseInt(br.readLine());
		} antenna[i] = Integer.parseInt(br.readLine()) antenna[i] antenna i Integer.parseInt(br.readLine()) Integer.parseInt Integer br.readLine() br.readLine br int k = Integer.parseInt(br.readLine()); k Integer.parseInt(br.readLine()) Integer.parseInt Integer br.readLine() br.readLine br if(antenna[4] -antenna[0] > k) {
			System.out.println(":(");
		}else {
			System.out.println("Yay!");
		} antenna[4] -antenna[0] > k antenna[4] -antenna[0] antenna[4] antenna 4 antenna[0] antenna 0 k {
			System.out.println(":(");
		} System.out.println(":(") System.out.println 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

import java.io.BufferedReader;
import java.io.InputStreamReader;

class Main {

	public static void main(String[] args) throws Exception {
		int antenna[] = new int[5];
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		for(int i=0; i<antenna.length; i++) {
			antenna[i] = Integer.parseInt(br.readLine());
		}
		int k = Integer.parseInt(br.readLine());

		if(antenna[4] -antenna[0] > k) {
			System.out.println(":(");
		}else {
			System.out.println("Yay!");
		}
	}

}
