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

Example Input: Sentence: 'a man rides a black motorcycle around a curve'. How many words contain the letter 'y' in the sentence.
Example Output: 1

Example Input: Sentence: 'a college student throws a frisbee in a field'. How many words contain the letter 't' in the sentence.
Example Output: 2

Example Input: Sentence: 'a man is sitting in a cubicle with a computer'. How many words contain the letter 'a' in the sentence.
Example Output:
4