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

Example Input: Sentence: 'a box filled with fresh fruit and vegetables'. How many words contain the letter 'w' in the sentence.
Example Output: 1

Example Input: Sentence: 'a silver truck a street a person and buildings'. How many words contain the letter 'l' in the sentence.
Example Output: 2

Example Input: Sentence: 'a truck that is driving down the road'. How many words contain the letter 'n' in the sentence.
Example Output:
2