import java.util.*;

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

        int[] x = new int[5];

        for(int i=0; i<5; i++){
            x[i] = sc.nextInt();
        }

        int k = sc.nextInt();

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

        int[] x = new int[5];

        for(int i=0; i<5; i++){
            x[i] = sc.nextInt();
        }

        int k = sc.nextInt();

        if(x[4]-x[0]>k){
            System.out.println(":(");
        }
        else if(x[4]-x[0]<=k){
            System.out.println("Yay!");
        }
    }
} Main public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        int[] x = new int[5];

        for(int i=0; i<5; i++){
            x[i] = sc.nextInt();
        }

        int k = sc.nextInt();

        if(x[4]-x[0]>k){
            System.out.println(":(");
        }
        else if(x[4]-x[0]<=k){
            System.out.println("Yay!");
        }
    } main {
        Scanner sc = new Scanner(System.in);

        int[] x = new int[5];

        for(int i=0; i<5; i++){
            x[i] = sc.nextInt();
        }

        int k = sc.nextInt();

        if(x[4]-x[0]>k){
            System.out.println(":(");
        }
        else if(x[4]-x[0]<=k){
            System.out.println("Yay!");
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] x = new int[5]; x new int[5] 5 for(int i=0; i<5; i++){
            x[i] = sc.nextInt();
        } int i=0; int i=0; i 0 i<5 i 5 i++ i++ i {
            x[i] = sc.nextInt();
        } {
            x[i] = sc.nextInt();
        } x[i] = sc.nextInt() x[i] x i sc.nextInt() sc.nextInt sc int k = sc.nextInt(); k sc.nextInt() sc.nextInt sc if(x[4]-x[0]>k){
            System.out.println(":(");
        }
        else if(x[4]-x[0]<=k){
            System.out.println("Yay!");
        } x[4]-x[0]>k x[4]-x[0] x[4] x 4 x[0] x 0 k {
            System.out.println(":(");
        } System.out.println(":(") System.out.println System.out System System.out ":(" if(x[4]-x[0]<=k){
            System.out.println("Yay!");
        } x[4]-x[0]<=k x[4]-x[0] x[4] x 4 x[0] x 0 k {
            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){
        Scanner sc = new Scanner(System.in);

        int[] x = new int[5];

        for(int i=0; i<5; i++){
            x[i] = sc.nextInt();
        }

        int k = sc.nextInt();

        if(x[4]-x[0]>k){
            System.out.println(":(");
        }
        else if(x[4]-x[0]<=k){
            System.out.println("Yay!");
        }
    }
} public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);

        int[] x = new int[5];

        for(int i=0; i<5; i++){
            x[i] = sc.nextInt();
        }

        int k = sc.nextInt();

        if(x[4]-x[0]>k){
            System.out.println(":(");
        }
        else if(x[4]-x[0]<=k){
            System.out.println("Yay!");
        }
    }
} Main
import java.util.*;

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

        int[] x = new int[5];

        for(int i=0; i<5; i++){
            x[i] = sc.nextInt();
        }

        int k = sc.nextInt();

        if(x[4]-x[0]>k){
            System.out.println(":(");
        }
        else if(x[4]-x[0]<=k){
            System.out.println("Yay!");
        }
    }
}