import java.util.*;

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

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