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

Example Input: Sentence: 'a woman poses with a large teddy bear'. How many words contain the letter 'u' in the sentence.
Example Output: 0

Example Input: Sentence: 'a tennis player holds a ball as if to throw it in the air to serve it'. How many words contain the letter 'o' in the sentence.
Example Output: 4

Example Input: Sentence: 'a man wearing ties and rainbow sun glasses'. How many words contain the letter 'm' in the sentence.
Example Output:
1