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

Example Input: Sentence: 'a young girl is brushing her teeth  in a bathroom'. How many words contain the letter 'f' in the sentence.
Example Output: 0

Example Input: Sentence: 'this bus waits at a bus station for passengers to board'. How many words contain the letter 'e' in the sentence.
Example Output: 1

Example Input: Sentence: 'a man is holding some food on a street corner'. How many words contain the letter 'e' in the sentence.
Example Output:
3