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

Example Input: Sentence: 'someone is holding an orange and black iphone'. How many words contain the letter 'h' in the sentence.
Example Output: 2

Example Input: Sentence: 'a room with a small light in the middle with a computer'. How many words contain the letter 's' in the sentence.
Example Output: 1

Example Input: Sentence: 'a workstation desk with a keyboard mouse and monitor'. How many words contain the letter 'r' in the sentence.
Example Output:
3