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

Input: Consider Input: Sentence: 'black and white photo of old man riding a motorcycle'. How many words contain the letter 'n' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a young man attempting to fly a kite on a forest hillside'. How many words contain the letter 'f' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a motorcycle parked in front of a small cafe'. How many words contain the letter 'n' in the sentence.


Output: 2