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

Input: Consider Input: Sentence: 'a plate has many different types of food on it'. How many words contain the letter 'r' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a young man dressed as a nun skateboards down the street'. How many words contain the letter 'e' in the sentence.

Output: 4


Input: Consider Input: Sentence: 'a person on skis rides on some snow'. How many words contain the letter 'w' in the sentence.


Output: 1