import java.util.*;

class Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int minNum = sc.nextInt();
        sc.nextInt();
        sc.nextInt();
        sc.nextInt();
        int maxNum = sc.nextInt();
        int limit = sc.nextInt();

        String ans;
        if(maxNum - minNum > limit){
            ans = ":(";
        }else{
            ans = "Yay!";
        }
        System.out.println(ans);
    }
} import java.util.*; util.* java class Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int minNum = sc.nextInt();
        sc.nextInt();
        sc.nextInt();
        sc.nextInt();
        int maxNum = sc.nextInt();
        int limit = sc.nextInt();

        String ans;
        if(maxNum - minNum > limit){
            ans = ":(";
        }else{
            ans = "Yay!";
        }
        System.out.println(ans);
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int minNum = sc.nextInt();
        sc.nextInt();
        sc.nextInt();
        sc.nextInt();
        int maxNum = sc.nextInt();
        int limit = sc.nextInt();

        String ans;
        if(maxNum - minNum > limit){
            ans = ":(";
        }else{
            ans = "Yay!";
        }
        System.out.println(ans);
    } main {
        Scanner sc = new Scanner(System.in);

        int minNum = sc.nextInt();
        sc.nextInt();
        sc.nextInt();
        sc.nextInt();
        int maxNum = sc.nextInt();
        int limit = sc.nextInt();

        String ans;
        if(maxNum - minNum > limit){
            ans = ":(";
        }else{
            ans = "Yay!";
        }
        System.out.println(ans);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int minNum = sc.nextInt(); minNum sc.nextInt() sc.nextInt sc sc.nextInt() sc.nextInt sc sc.nextInt() sc.nextInt sc sc.nextInt() sc.nextInt sc int maxNum = sc.nextInt(); maxNum sc.nextInt() sc.nextInt sc int limit = sc.nextInt(); limit sc.nextInt() sc.nextInt sc String ans; ans if(maxNum - minNum > limit){
            ans = ":(";
        }else{
            ans = "Yay!";
        } maxNum - minNum > limit maxNum - minNum maxNum minNum limit {
            ans = ":(";
        } ans = ":(" ans ":(" {
            ans = "Yay!";
        } ans = "Yay!" ans "Yay!" System.out.println(ans) System.out.println System.out System System.out ans String[] args args
import java.util.*;

class Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int minNum = sc.nextInt();
        sc.nextInt();
        sc.nextInt();
        sc.nextInt();
        int maxNum = sc.nextInt();
        int limit = sc.nextInt();

        String ans;
        if(maxNum - minNum > limit){
            ans = ":(";
        }else{
            ans = "Yay!";
        }
        System.out.println(ans);
    }
}