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

Example Input: Sentence: 'a man in a helmet leans on his motorcycle'. How many words contain the letter 'n' in the sentence.
Example Output: 4

Example Input: Sentence: 'a man is sitting in a cubicle with a computer'. How many words contain the letter 'a' in the sentence.
Example Output: 4

Example Input: Sentence: 'a lady looks blurry while standing in her kitchen'. How many words contain the letter 'j' in the sentence.
Example Output:
0