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

Example Input: Sentence: 'a man flying through the air while riding a snowboard'. How many words contain the letter 'x' in the sentence.
Example Output: 0

Example Input: Sentence: 'a boy in a car on a laptop'. How many words contain the letter 'j' in the sentence.
Example Output: 0

Example Input: Sentence: 'a woman is swinging a racquet at a ball as she clinches her teeth'. How many words contain the letter 'b' in the sentence.
Example Output:
1