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

Example Input: Sentence: 'two men are dancing in a parade with brown umbrellas'. How many words contain the letter 'r' in the sentence.
Example Output: 4

Example Input: Sentence: 'man running to catch a frisbee in a springtime park'. How many words contain the letter 'j' in the sentence.
Example Output: 0

Example Input: Sentence: 'a large clock tower under a grey cloudy sky'. How many words contain the letter 'l' in the sentence.
Example Output:
3