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

Example Input: Sentence: 'pair of one kind of birds and another bird perched on a railing'. How many words contain the letter 'j' in the sentence.
Example Output: 0

Example Input: Sentence: 'a large pizza smothered in cheese and sauce'. How many words contain the letter 'a' in the sentence.
Example Output: 5

Example Input: Sentence: 'a laptop computer sitting on top of a couch'. How many words contain the letter 'j' in the sentence.
Example Output:
0