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

Example Input: Sentence: 'a rack full of clothes in a small bedroom'. How many words contain the letter 'o' in the sentence.
Example Output: 3

Example Input: Sentence: 'a blue and white fire hydrant and two cars parked across the street'. How many words contain the letter 'y' in the sentence.
Example Output: 1

Example Input: Sentence: 'a pot with small flowers on a table'. How many words contain the letter 'f' in the sentence.
Example Output:
1