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

Input: Consider Input: Sentence: 'a large pizza smothered in cheese and sauce'. How many words contain the letter 'a' in the sentence.

Output: 5

Input: Consider Input: Sentence: 'a lit street light next to a bar'. How many words contain the letter 'w' in the sentence.

Output: 0

Input: Consider Input: Sentence: 'water is being boiled over the top of a stove'. How many words contain the letter 'd' in the sentence.
Output: 1