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

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 green blue and yellow boat sitting in a harbor'. How many words contain the letter 'o' in the sentence.
Example Output: 3

Example Input: Sentence: 'many different types of vehicles on a street'. How many words contain the letter 'y' in the sentence.
Example Output:
2