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

Example Input: Sentence: 'a bus station full of people walking on the side walk'. How many words contain the letter 'q' in the sentence.
Example Output: 0

Example Input: Sentence: 'a sign asking for witnesses is posted in front of a destroyed home'. How many words contain the letter 'y' in the sentence.
Example Output: 1

Example Input: Sentence: 'a sculpture of a dinosaur in a field where kites are being flown'. How many words contain the letter 'u' in the sentence.
Example Output:
2