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

Example Input: Sentence: 'a woman is smiling next to a dog'. How many words contain the letter 'j' in the sentence.
Example Output: 0

Example Input: Sentence: 'a tabby cat under a white comforter and on top of a cream colored pillow'. How many words contain the letter 'l' in the sentence.
Example Output: 2

Example Input: Sentence: 'a street sign buildings cars people and trees'. How many words contain the letter 'n' in the sentence.
Example Output:
3