import java.util.Scanner;

public class Main {
    public static void main(String args[]){
        Scanner stdIn = new Scanner(System.in);
        int x[] = new int[5];
        for(int i = 0; i < 5; i++){
            x[i] = stdIn.nextInt();
        }
        
        //int a = stdIn.nextInt();
        //int b = stdIn.nextInt();
        //int n = stdIn.nextInt();
        int k = stdIn.nextInt();
        
        if(x[4] - x[0] <= k){
            System.out.println("Yay!");
        }else{
            System.out.println(":(");
        }
        
        //System.out.println();
        //System.out.print();
    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String args[]){
        Scanner stdIn = new Scanner(System.in);
        int x[] = new int[5];
        for(int i = 0; i < 5; i++){
            x[i] = stdIn.nextInt();
        }
        
        //int a = stdIn.nextInt();
        //int b = stdIn.nextInt();
        //int n = stdIn.nextInt();
        int k = stdIn.nextInt();
        
        if(x[4] - x[0] <= k){
            System.out.println("Yay!");
        }else{
            System.out.println(":(");
        }
        
        //System.out.println();
        //System.out.print();
    }
} Main public static void main(String args[]){
        Scanner stdIn = new Scanner(System.in);
        int x[] = new int[5];
        for(int i = 0; i < 5; i++){
            x[i] = stdIn.nextInt();
        }
        
        //int a = stdIn.nextInt();
        //int b = stdIn.nextInt();
        //int n = stdIn.nextInt();
        int k = stdIn.nextInt();
        
        if(x[4] - x[0] <= k){
            System.out.println("Yay!");
        }else{
            System.out.println(":(");
        }
        
        //System.out.println();
        //System.out.print();
    } main {
        Scanner stdIn = new Scanner(System.in);
        int x[] = new int[5];
        for(int i = 0; i < 5; i++){
            x[i] = stdIn.nextInt();
        }
        
        //int a = stdIn.nextInt();
        //int b = stdIn.nextInt();
        //int n = stdIn.nextInt();
        int k = stdIn.nextInt();
        
        if(x[4] - x[0] <= k){
            System.out.println("Yay!");
        }else{
            System.out.println(":(");
        }
        
        //System.out.println();
        //System.out.print();
    } Scanner stdIn = new Scanner(System.in); stdIn new Scanner(System.in) int x[] = new int[5]; x new int[5] 5 for(int i = 0; i < 5; i++){
            x[i] = stdIn.nextInt();
        } int i = 0; int i = 0; i 0 i < 5 i 5 i++ i++ i {
            x[i] = stdIn.nextInt();
        } {
            x[i] = stdIn.nextInt();
        } x[i] = stdIn.nextInt() x[i] x i stdIn.nextInt() stdIn.nextInt stdIn int k = stdIn.nextInt(); k stdIn.nextInt() stdIn.nextInt stdIn if(x[4] - x[0] <= k){
            System.out.println("Yay!");
        }else{
            System.out.println(":(");
        } 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!" {
            System.out.println(":(");
        } System.out.println(":(") System.out.println System.out System System.out ":(" String args[] args public class Main {
    public static void main(String args[]){
        Scanner stdIn = new Scanner(System.in);
        int x[] = new int[5];
        for(int i = 0; i < 5; i++){
            x[i] = stdIn.nextInt();
        }
        
        //int a = stdIn.nextInt();
        //int b = stdIn.nextInt();
        //int n = stdIn.nextInt();
        int k = stdIn.nextInt();
        
        if(x[4] - x[0] <= k){
            System.out.println("Yay!");
        }else{
            System.out.println(":(");
        }
        
        //System.out.println();
        //System.out.print();
    }
} public class Main {
    public static void main(String args[]){
        Scanner stdIn = new Scanner(System.in);
        int x[] = new int[5];
        for(int i = 0; i < 5; i++){
            x[i] = stdIn.nextInt();
        }
        
        //int a = stdIn.nextInt();
        //int b = stdIn.nextInt();
        //int n = stdIn.nextInt();
        int k = stdIn.nextInt();
        
        if(x[4] - x[0] <= k){
            System.out.println("Yay!");
        }else{
            System.out.println(":(");
        }
        
        //System.out.println();
        //System.out.print();
    }
} Main
import java.util.Scanner;

public class Main {
    public static void main(String args[]){
        Scanner stdIn = new Scanner(System.in);
        int x[] = new int[5];
        for(int i = 0; i < 5; i++){
            x[i] = stdIn.nextInt();
        }
        
        //int a = stdIn.nextInt();
        //int b = stdIn.nextInt();
        //int n = stdIn.nextInt();
        int k = stdIn.nextInt();
        
        if(x[4] - x[0] <= k){
            System.out.println("Yay!");
        }else{
            System.out.println(":(");
        }
        
        //System.out.println();
        //System.out.print();
    }
}
