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: 'young girls with backpacks are standing near stairs that look to go to the subway'. How many words contain the letter 'r' in the sentence.
Example Output: 4

Example Input: Sentence: 'a traffic light with various stickers encompassing it'. How many words contain the letter 'p' in the sentence.
Example Output:
1