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

Example Input: Sentence: 'black and white photograph of a man using a cell phone on the street'. How many words contain the letter 'r' in the sentence.
Example Output: 2

Example Input: Sentence: 'a man in a tie that is looking to the side'. How many words contain the letter 'm' in the sentence.
Example Output: 1

Example Input: Sentence: 'a wet rain soaked street below a very tall building'. How many words contain the letter 'g' in the sentence.
Example Output:
1