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

Example Input: Sentence: 'a bearded man sits on a couch with an electronic device in his hand'. How many words contain the letter 'e' in the sentence.
Example Output: 3

Example Input: Sentence: 'a man in mid swing of a baseball bat'. How many words contain the letter 'k' in the sentence.
Example Output: 0

Example Input: Sentence: 'a young man dressed in green looking out a window'. How many words contain the letter 'r' in the sentence.
Example Output:
2