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

Example Input: Sentence: 'three children standing behind a little girl with a bat in her hands'. How many words contain the letter 'c' in the sentence.
Example Output: 1

Example Input: Sentence: 'he wants everyone to know that he has serious intentions for the tennis game'. How many words contain the letter 'h' in the sentence.
Example Output: 5

Example Input: Sentence: 'a pair of thick scissors laying on a white surface'. How many words contain the letter 's' in the sentence.
Example Output:
2