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

Example Input: Sentence: 'there is a person awaiting to cross this street'. How many words contain the letter 'a' in the sentence.
Example Output: 2

Example Input: Sentence: 'an elephant near a man sitting down'. How many words contain the letter 'y' in the sentence.
Example Output: 0

Example Input: Sentence: 'hotdog with pickles onions and mustard on a bun on foil'. How many words contain the letter 'j' in the sentence.
Example Output:
0