Please modify & correct the sentence$-$generator program of Case Study $5-1($in the file generator.py$)$ so that it inputs its vocabulary from a set of text files at startup. The filenames are nouns.txt$,$ verbs.txt$,$ articles.txt$,$ and prepositions.txt$.($Hint: Define a single new function, getWords. This function should expect a filename as an argument. The function should open an input file with this name, define a temporary list, read words from the file, and add them to the list. The function should then convert the list to a tuple and return this tuple. Call the function with an actual filename to initialize each of the four variables for the vocabulary.$)$

import random

def getWords$($filename$)$:

$"""$

$$ Reads words from a given file and returns them as a tuple.

$$

$$ Args:

$$ filename $($str$)$: The name of the file containing the words.

$$

$$ Returns:

$$ tuple: A tuple containing all the words from the file.

$"""$

$$ with open$($filename$,\text{'}$r$\text{'})$ as file:

$$ words $=[$line$.$strip$().$upper$()$ for line in file$]$

$$ return tuple$($words$)$

# Initialize vocabulary from text files

articles $=$ getWords$(\text{'}$articles$.$txt$\text{'})$

nouns $=$ getWords$(\text{'}$nouns$.$txt$\text{'})$

verbs $=$ getWords$(\text{'}$verbs$.$txt$\text{'})$

prepositions $=$ getWords$(\text{'}$prepositions$.$txt$\text{'})$

def sentence$()$:

$"""$

$$ Constructs a random sentence.

$$

$$ Returns:

$$ str: A randomly generated sentence.

$"""$

$$ return nounPhrase$()+""+$ verbPhrase$()$

def nounPhrase$()$:

$"""$

$$ Constructs a random noun phrase.

$$

$$ Returns:

$$ str: A randomly generated noun phrase.

$"""$

$$ return random.choice$($articles$)+""+$ random.choice$($nouns$)$

def verbPhrase$()$:

$"""$

$$ Constructs a random verb phrase.

$$

$$ Returns:

$$ str: A randomly generated verb phrase.

$"""$

$$ return random.choice$($verbs$)+""+$ nounPhrase$()+""+$ prepositionalPhrase$()$

def prepositionalPhrase$()$:

$"""$

$$ Constructs a random prepositional phrase.

$$

$$ Returns:

$$ str: A randomly generated prepositional phrase.

$"""$

$$ return random.choice$($prepositions$)+""+$ nounPhrase$()$

def main$()$:

$"""$

$$ Main function to generate and print random sentences.

$"""$

$$ number $=$ int$($input$(\text{'}$Enter the number of sentences: $\text{'}))$

$$ for count in range$($number$)$:

$$ print$($sentence$())$

if $\_\_$name$\_\_==\text{'}\_\_$main$\_\_\text{'}$:

$$ main$()$