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

Input: Consider Input: Sentence: 'a woman riding a motorcycle down a busy city street'. How many words contain the letter 'w' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'people riding on an old style passenger train'. How many words contain the letter 'q' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a vehicle that is viewing cattle from behind it'. How many words contain the letter 'n' in the sentence.


Output: 2