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

Example Input: Sentence: 'a bunch of people in a big field filled with bananas'. How many words contain the letter 'r' in the sentence.
Example Output: 0

Example Input: Sentence: 'two giraffe a mom and baby both with their heads up'. How many words contain the letter 'w' in the sentence.
Example Output: 2

Example Input: Sentence: 'a side profile of a man sitting down and holding something'. How many words contain the letter 'z' in the sentence.
Example Output:
0