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

Example Input: Sentence: 'a large clock tower under a grey cloudy sky'. How many words contain the letter 'l' in the sentence.
Example Output: 3

Example Input: Sentence: 'a very cute white dog standing by a table with food'. How many words contain the letter 'o' in the sentence.
Example Output: 2

Example Input: Sentence: 'a large truck drives by while two men wearing bicycle helmets stand in a small crowd on a corner'. How many words contain the letter 'c' in the sentence.
Example Output:
4