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

public class Main {
	public static void main(String[] args) throws IOException {
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    	String str = br.readLine();
    	final int A = Integer.parseInt(str);
    	str = br.readLine();
    	final int B = Integer.parseInt(str);
    	str = br.readLine();
    	final int C = Integer.parseInt(str);
    	str = br.readLine();
    	final int D = Integer.parseInt(str);
    	str = br.readLine();
    	final int E = Integer.parseInt(str);
    	str = br.readLine();
    	
    	final int K = Integer.parseInt(str);
    	
    	boolean communicationAvailable = false;
    	
    	if (E - A <= K) {
    		communicationAvailable = true;
    	}
    	
    	if (communicationAvailable) {
    		System.out.println("Yay!");
    	} else {
    		System.out.println(":(");
    	}
    }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {
	public static void main(String[] args) throws IOException {
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    	String str = br.readLine();
    	final int A = Integer.parseInt(str);
    	str = br.readLine();
    	final int B = Integer.parseInt(str);
    	str = br.readLine();
    	final int C = Integer.parseInt(str);
    	str = br.readLine();
    	final int D = Integer.parseInt(str);
    	str = br.readLine();
    	final int E = Integer.parseInt(str);
    	str = br.readLine();
    	
    	final int K = Integer.parseInt(str);
    	
    	boolean communicationAvailable = false;
    	
    	if (E - A <= K) {
    		communicationAvailable = true;
    	}
    	
    	if (communicationAvailable) {
    		System.out.println("Yay!");
    	} else {
    		System.out.println(":(");
    	}
    }
} Main public static void main(String[] args) throws IOException {
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    	String str = br.readLine();
    	final int A = Integer.parseInt(str);
    	str = br.readLine();
    	final int B = Integer.parseInt(str);
    	str = br.readLine();
    	final int C = Integer.parseInt(str);
    	str = br.readLine();
    	final int D = Integer.parseInt(str);
    	str = br.readLine();
    	final int E = Integer.parseInt(str);
    	str = br.readLine();
    	
    	final int K = Integer.parseInt(str);
    	
    	boolean communicationAvailable = false;
    	
    	if (E - A <= K) {
    		communicationAvailable = true;
    	}
    	
    	if (communicationAvailable) {
    		System.out.println("Yay!");
    	} else {
    		System.out.println(":(");
    	}
    } main {
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    	String str = br.readLine();
    	final int A = Integer.parseInt(str);
    	str = br.readLine();
    	final int B = Integer.parseInt(str);
    	str = br.readLine();
    	final int C = Integer.parseInt(str);
    	str = br.readLine();
    	final int D = Integer.parseInt(str);
    	str = br.readLine();
    	final int E = Integer.parseInt(str);
    	str = br.readLine();
    	
    	final int K = Integer.parseInt(str);
    	
    	boolean communicationAvailable = false;
    	
    	if (E - A <= K) {
    		communicationAvailable = true;
    	}
    	
    	if (communicationAvailable) {
    		System.out.println("Yay!");
    	} else {
    		System.out.println(":(");
    	}
    } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String str = br.readLine(); str br.readLine() br.readLine br final int A = Integer.parseInt(str); A Integer.parseInt(str) Integer.parseInt Integer str str = br.readLine() str br.readLine() br.readLine br final int B = Integer.parseInt(str); B Integer.parseInt(str) Integer.parseInt Integer str str = br.readLine() str br.readLine() br.readLine br final int C = Integer.parseInt(str); C Integer.parseInt(str) Integer.parseInt Integer str str = br.readLine() str br.readLine() br.readLine br final int D = Integer.parseInt(str); D Integer.parseInt(str) Integer.parseInt Integer str str = br.readLine() str br.readLine() br.readLine br final int E = Integer.parseInt(str); E Integer.parseInt(str) Integer.parseInt Integer str str = br.readLine() str br.readLine() br.readLine br final int K = Integer.parseInt(str); K Integer.parseInt(str) Integer.parseInt Integer str boolean communicationAvailable = false; communicationAvailable false if (E - A <= K) {
    		communicationAvailable = true;
    	} E - A <= K E - A E A K {
    		communicationAvailable = true;
    	} communicationAvailable = true communicationAvailable true if (communicationAvailable) {
    		System.out.println("Yay!");
    	} else {
    		System.out.println(":(");
    	} communicationAvailable {
    		System.out.println("Yay!");
    	} System.out.println("Yay!") System.out.println System.out System System.out "Yay!" {
    		System.out.println(":(");
    	} System.out.println(":(") System.out.println System.out System System.out ":(" String[] args args public class Main {
	public static void main(String[] args) throws IOException {
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    	String str = br.readLine();
    	final int A = Integer.parseInt(str);
    	str = br.readLine();
    	final int B = Integer.parseInt(str);
    	str = br.readLine();
    	final int C = Integer.parseInt(str);
    	str = br.readLine();
    	final int D = Integer.parseInt(str);
    	str = br.readLine();
    	final int E = Integer.parseInt(str);
    	str = br.readLine();
    	
    	final int K = Integer.parseInt(str);
    	
    	boolean communicationAvailable = false;
    	
    	if (E - A <= K) {
    		communicationAvailable = true;
    	}
    	
    	if (communicationAvailable) {
    		System.out.println("Yay!");
    	} else {
    		System.out.println(":(");
    	}
    }
} public class Main {
	public static void main(String[] args) throws IOException {
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    	String str = br.readLine();
    	final int A = Integer.parseInt(str);
    	str = br.readLine();
    	final int B = Integer.parseInt(str);
    	str = br.readLine();
    	final int C = Integer.parseInt(str);
    	str = br.readLine();
    	final int D = Integer.parseInt(str);
    	str = br.readLine();
    	final int E = Integer.parseInt(str);
    	str = br.readLine();
    	
    	final int K = Integer.parseInt(str);
    	
    	boolean communicationAvailable = false;
    	
    	if (E - A <= K) {
    		communicationAvailable = true;
    	}
    	
    	if (communicationAvailable) {
    		System.out.println("Yay!");
    	} else {
    		System.out.println(":(");
    	}
    }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) throws IOException {
    	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    	String str = br.readLine();
    	final int A = Integer.parseInt(str);
    	str = br.readLine();
    	final int B = Integer.parseInt(str);
    	str = br.readLine();
    	final int C = Integer.parseInt(str);
    	str = br.readLine();
    	final int D = Integer.parseInt(str);
    	str = br.readLine();
    	final int E = Integer.parseInt(str);
    	str = br.readLine();
    	
    	final int K = Integer.parseInt(str);
    	
    	boolean communicationAvailable = false;
    	
    	if (E - A <= K) {
    		communicationAvailable = true;
    	}
    	
    	if (communicationAvailable) {
    		System.out.println("Yay!");
    	} else {
    		System.out.println(":(");
    	}
    }
}