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

Example Input: Sentence: 'a plate with a grilled sanwich next to a bowl of tomato soup'. How many words contain the letter 'a' in the sentence.
Example Output: 6

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 small aircraft is taking off from the runway'. How many words contain the letter 's' in the sentence.
Example Output:
2