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

Example Input: Sentence: 'a woman with a shopping bag talking on a cell phone'. How many words contain the letter 'e' in the sentence.
Example Output: 2

Example Input: Sentence: 'an image of a building with a steeple and birds flying overhead reflected in the water'. How many words contain the letter 'u' in the sentence.
Example Output: 1

Example Input: Sentence: 'a tray full of muffins with a little sign on it'. How many words contain the letter 'k' in the sentence.
Example Output:
0