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

Input: Consider Input: Sentence: 'a very cute white dog standing by a table with food'. How many words contain the letter 'o' in the sentence.

Output: 2

Input: Consider Input: Sentence: 'a person eating a slice of pizza on a table'. How many words contain the letter 'z' in the sentence.

Output: 1

Input: Consider Input: Sentence: 'the bathroom counter with ornaments and towels on it'. How many words contain the letter 's' in the sentence.
Output: 2