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

Input: Consider Input: Sentence: 'a sign that shows you are entering into joshua tree national park'. How many words contain the letter 't' in the sentence.

Output: 5


Input: Consider Input: Sentence: 'a man holding a tennis racquet on a tennis court'. How many words contain the letter 'w' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a line of people at a bus stop getting onto a white bus'. How many words contain the letter 's' in the sentence.


Output: 3