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

Example Input: Sentence: 'a group of many horses going about in a grassy meadow'. How many words contain the letter 'f' in the sentence.
Example Output: 1

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 little girl is preparing food at a table'. How many words contain the letter 'b' in the sentence.
Example Output:
1