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

Example Input: Sentence: 'an older fighter plan sitting next to a group military men'. How many words contain the letter 'y' in the sentence.
Example Output: 1

Example Input: Sentence: 'a large elephant is walking by some bars'. How many words contain the letter 'v' in the sentence.
Example Output: 0

Example Input: Sentence: 'a man standing in a kitchen petting a cat sitting on a counter'. How many words contain the letter 's' in the sentence.
Example Output:
2