import java.util.*;

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

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        
        int[] A = new int[5];
        
        for(int i=0; i<5; i++)
            A[i] = sc.nextInt();
        
        Arrays.sort(A);
        
        System.out.println(A[4]-A[0]<=sc.nextInt()? "Yay!":":(");
    }
}
