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

Input: Consider Input: Sentence: 'a man and a woman sitting in the backseat as the woman talks on a cell phone'. How many words contain the letter 's' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a bench is in the ocean water with a fishing pole'. How many words contain the letter 'm' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a man standing on a busy sidewalk while talking on his cellphone'. How many words contain the letter 't' in the sentence.


Output: 2