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

Example Input: Sentence: 'the view from the top of a ski slope'. How many words contain the letter 'r' in the sentence.
Example Output: 1

Example Input: Sentence: 'a very cute white dog standing by a table with food'. How many words contain the letter 'o' in the sentence.
Example Output: 2

Example Input: Sentence: 'a man rides a black motorcycle around a curve'. How many words contain the letter 'y' in the sentence.
Example Output:
1