import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[] args)throws IOException {
        Scanner sc = new Scanner(System.in);
        //BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        //PrintWriter out = new PrintWriter(System.out);
        int[] a = new int[5];
        for(int i=0;i<5;i++) a[i]= sc.nextInt();
        int k = sc.nextInt();
        String ans = a[4]-a[0]<=k?"Yay!":":(";
        System.out.println(ans);
    }
} import java.io.*; io.* java import java.util.*; util.* java public class Main {
    public static void main(String[] args)throws IOException {
        Scanner sc = new Scanner(System.in);
        //BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        //PrintWriter out = new PrintWriter(System.out);
        int[] a = new int[5];
        for(int i=0;i<5;i++) a[i]= sc.nextInt();
        int k = sc.nextInt();
        String ans = a[4]-a[0]<=k?"Yay!":":(";
        System.out.println(ans);
    }
} Main public static void main(String[] args)throws IOException {
        Scanner sc = new Scanner(System.in);
        //BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        //PrintWriter out = new PrintWriter(System.out);
        int[] a = new int[5];
        for(int i=0;i<5;i++) a[i]= sc.nextInt();
        int k = sc.nextInt();
        String ans = a[4]-a[0]<=k?"Yay!":":(";
        System.out.println(ans);
    } main {
        Scanner sc = new Scanner(System.in);
        //BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        //PrintWriter out = new PrintWriter(System.out);
        int[] a = new int[5];
        for(int i=0;i<5;i++) a[i]= sc.nextInt();
        int k = sc.nextInt();
        String ans = a[4]-a[0]<=k?"Yay!":":(";
        System.out.println(ans);
    } 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 int k = sc.nextInt(); k sc.nextInt() sc.nextInt sc String ans = a[4]-a[0]<=k?"Yay!":":("; ans a[4]-a[0]<=k?"Yay!":":(" a[4]-a[0]<=k a[4]-a[0] a[4] a 4 a[0] a 0 k "Yay!" ":(" System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {
    public static void main(String[] args)throws IOException {
        Scanner sc = new Scanner(System.in);
        //BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        //PrintWriter out = new PrintWriter(System.out);
        int[] a = new int[5];
        for(int i=0;i<5;i++) a[i]= sc.nextInt();
        int k = sc.nextInt();
        String ans = a[4]-a[0]<=k?"Yay!":":(";
        System.out.println(ans);
    }
} public class Main {
    public static void main(String[] args)throws IOException {
        Scanner sc = new Scanner(System.in);
        //BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        //PrintWriter out = new PrintWriter(System.out);
        int[] a = new int[5];
        for(int i=0;i<5;i++) a[i]= sc.nextInt();
        int k = sc.nextInt();
        String ans = a[4]-a[0]<=k?"Yay!":":(";
        System.out.println(ans);
    }
} Main
import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[] args)throws IOException {
        Scanner sc = new Scanner(System.in);
        //BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        //PrintWriter out = new PrintWriter(System.out);
        int[] a = new int[5];
        for(int i=0;i<5;i++) a[i]= sc.nextInt();
        int k = sc.nextInt();
        String ans = a[4]-a[0]<=k?"Yay!":":(";
        System.out.println(ans);
    }
}