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

Example Input: Sentence: 'an elephant near a man sitting down'. How many words contain the letter 'y' in the sentence.
Example Output: 0

Example Input: Sentence: 'a woman standing on a beach near the water'. How many words contain the letter 'n' in the sentence.
Example Output: 4

Example Input: Sentence: 'a calculator a cell phone and a camera sit on a table'. How many words contain the letter 'b' in the sentence.
Example Output:
1