how can i improve this file to account for space index when user enters a letter: import java.util.Scanner;

public class Hangman$\{$

private static final boolean testingMode$=$true;

private static String level$=""$;

private static boolean keepPlaying$=$true;

private static String hiddenWord$=""$;

private static int numGuesses$=0$;

private static int numSpaces$=0$;

public static void main$($String$[]$args$)\{$

Scanner console$=$new Scanner$($System$.$in$)$;

while$($keepPlaying$)\{$

System.out.println$("$Enter your difficulty: Easy$($e$),$ Intermediate$($i$),$ or Hard$($h$)")$;

level$=$console.nextLine$()$;

while$(!$level.equalsIgnoreCase$("$e$")$&&

$!$level.equalsIgnoreCase$("$i$")$&&

$!$level.equalsIgnoreCase$("$h$"))\{$

System.out.println$("$Not a valid input"$)$;

level$=$console.nextLine$()$;

$\}$

Hang$($level$,$ console$)$;

System.out.println$("$Would you like to play again? Enter y or n to continue"$)$;

keepPlaying$=$console.nextLine$().$equalsIgnoreCase$("$y$")$;

$\}$

System.exit$(0)$;

$\}$

private static void Hang$($String level, Scanner console$)\{$

String secretWord$=$RandomWord.newWord$()$;

if$($testingMode$)\{$

System.out.println$("$The secret word is: $"+$ secretWord$)$;

$\}$

if$($level$.$equalsIgnoreCase$("$e$"))\{$

numGuesses$=15$;

numSpaces$=4$;

$\}$

else if$($level$.$equalsIgnoreCase$("$i$"))\{$

numGuesses$=12$;

numSpaces$=3$;

$\}$

else if$($level$.$equalsIgnoreCase$("$h$"))\{$

numGuesses$=10$;

numSpaces$=2$;

$\}$

for$($int i$=0$; i$<$ secretWord$.$length$()$;i$++)\{$

hiddenWord$+="-"$;

$\}$

System.out.println$("$The word is: $"+$ hiddenWord$)$;

while$(!$hiddenWord.equals$($secretWord$))\{$

System.out.print$("$Please enter the letter you want to guess: $")$;

String guess$=$console.nextLine$()$;

System.out.println$("$Please enter the spaces you want to check $($seperated by spaces$)$: $")$;

numSpaces$=$console.nextInt$()$;

console.nextLine$()$;

if$($guess$.$length$()>1||!$Character.isLetter$($guess$.$charAt$(0)))\{$

System.out.println$("$Your input is not valid. Try again"$)$;

System.out.println$("$Guesses remaining: $"+$ numGuesses$)$;

$\}$

else$\{$

char let$=$guess.charAt$(0)$;

for $($int i$=0$;i