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

Input: Consider Input: Sentence: 'a blue traffic sign next to a parked car on a city street'. How many words contain the letter 'g' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a persons desk with a computer and many books in a case behind it'. How many words contain the letter 'd' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'an elderly man playing a video game with a remote control'. How many words contain the letter 'a' in the sentence.


Output: 6