import java.util.*;

class Main {
    public static void main(String args[]) {
        Scanner inp = new Scanner(System.in);
        int a = inp.nextInt();
        inp.nextInt();inp.nextInt();inp.nextInt();
        int e = inp.nextInt();
        int k = inp.nextInt();
        if (e - a <= k) System.out.println("Yay!");
        else System.out.println(":(");
        inp.close();
    }
} import java.util.*; util.* java class Main {
    public static void main(String args[]) {
        Scanner inp = new Scanner(System.in);
        int a = inp.nextInt();
        inp.nextInt();inp.nextInt();inp.nextInt();
        int e = inp.nextInt();
        int k = inp.nextInt();
        if (e - a <= k) System.out.println("Yay!");
        else System.out.println(":(");
        inp.close();
    }
} Main public static void main(String args[]) {
        Scanner inp = new Scanner(System.in);
        int a = inp.nextInt();
        inp.nextInt();inp.nextInt();inp.nextInt();
        int e = inp.nextInt();
        int k = inp.nextInt();
        if (e - a <= k) System.out.println("Yay!");
        else System.out.println(":(");
        inp.close();
    } main {
        Scanner inp = new Scanner(System.in);
        int a = inp.nextInt();
        inp.nextInt();inp.nextInt();inp.nextInt();
        int e = inp.nextInt();
        int k = inp.nextInt();
        if (e - a <= k) System.out.println("Yay!");
        else System.out.println(":(");
        inp.close();
    } Scanner inp = new Scanner(System.in); inp new Scanner(System.in) int a = inp.nextInt(); a inp.nextInt() inp.nextInt inp inp.nextInt() inp.nextInt inp inp.nextInt() inp.nextInt inp inp.nextInt() inp.nextInt inp int e = inp.nextInt(); e inp.nextInt() inp.nextInt inp int k = inp.nextInt(); k inp.nextInt() inp.nextInt inp if (e - a <= k) System.out.println("Yay!");
        else System.out.println(":("); e - a <= k e - a e a k System.out.println("Yay!") System.out.println System.out System System.out "Yay!" System.out.println(":(") System.out.println System.out System System.out ":(" inp.close() inp.close inp String args[] args
import java.util.*;

class Main {
    public static void main(String args[]) {
        Scanner inp = new Scanner(System.in);
        int a = inp.nextInt();
        inp.nextInt();inp.nextInt();inp.nextInt();
        int e = inp.nextInt();
        int k = inp.nextInt();
        if (e - a <= k) System.out.println("Yay!");
        else System.out.println(":(");
        inp.close();
    }
}
