import java.io.*;

class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = br.readLine();
        int a = Integer.parseInt(str);
        str = br.readLine();
        int b = Integer.parseInt(str);
        str = br.readLine();
        int c = Integer.parseInt(str);
        str = br.readLine();
        int d = Integer.parseInt(str);
        str = br.readLine();
        int e = Integer.parseInt(str);
        str = br.readLine();
        int k = Integer.parseInt(str);
        if (e-a>k){
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        }
    }
} import java.io.*; io.* java class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = br.readLine();
        int a = Integer.parseInt(str);
        str = br.readLine();
        int b = Integer.parseInt(str);
        str = br.readLine();
        int c = Integer.parseInt(str);
        str = br.readLine();
        int d = Integer.parseInt(str);
        str = br.readLine();
        int e = Integer.parseInt(str);
        str = br.readLine();
        int k = Integer.parseInt(str);
        if (e-a>k){
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        }
    }
} Main public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = br.readLine();
        int a = Integer.parseInt(str);
        str = br.readLine();
        int b = Integer.parseInt(str);
        str = br.readLine();
        int c = Integer.parseInt(str);
        str = br.readLine();
        int d = Integer.parseInt(str);
        str = br.readLine();
        int e = Integer.parseInt(str);
        str = br.readLine();
        int k = Integer.parseInt(str);
        if (e-a>k){
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        }
    } main {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = br.readLine();
        int a = Integer.parseInt(str);
        str = br.readLine();
        int b = Integer.parseInt(str);
        str = br.readLine();
        int c = Integer.parseInt(str);
        str = br.readLine();
        int d = Integer.parseInt(str);
        str = br.readLine();
        int e = Integer.parseInt(str);
        str = br.readLine();
        int k = Integer.parseInt(str);
        if (e-a>k){
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        }
    } 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 int a = Integer.parseInt(str); a Integer.parseInt(str) Integer.parseInt Integer str str = br.readLine() str br.readLine() br.readLine br int b = Integer.parseInt(str); b Integer.parseInt(str) Integer.parseInt Integer str str = br.readLine() str br.readLine() br.readLine br int c = Integer.parseInt(str); c Integer.parseInt(str) Integer.parseInt Integer str str = br.readLine() str br.readLine() br.readLine br int d = Integer.parseInt(str); d Integer.parseInt(str) Integer.parseInt Integer str str = br.readLine() str br.readLine() br.readLine br int e = Integer.parseInt(str); e Integer.parseInt(str) Integer.parseInt Integer str str = br.readLine() str br.readLine() br.readLine br int k = Integer.parseInt(str); k Integer.parseInt(str) Integer.parseInt Integer str if (e-a>k){
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        } e-a>k e-a e a 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.*;

class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str = br.readLine();
        int a = Integer.parseInt(str);
        str = br.readLine();
        int b = Integer.parseInt(str);
        str = br.readLine();
        int c = Integer.parseInt(str);
        str = br.readLine();
        int d = Integer.parseInt(str);
        str = br.readLine();
        int e = Integer.parseInt(str);
        str = br.readLine();
        int k = Integer.parseInt(str);
        if (e-a>k){
            System.out.println(":(");
        } else {
            System.out.println("Yay!");
        }
    }
}