In this task, you need to count the number of words in a sentence that contain the given letter

Example Input: Sentence: 'a woman is holding an umbrella and walking across the street'. How many words contain the letter 't' in the sentence.
Example Output: 2

Example Input: Sentence: 'a blue and white fire hydrant and two cars parked across the street'. How many words contain the letter 'y' in the sentence.
Example Output: 1

Example Input: Sentence: 'a pretty white cat sits patiently beneath a white parasol'. How many words contain the letter 'n' in the sentence.
Example Output:
2