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

Ex Input:
Sentence: 'a woman standing next to two baby elephants'. How many words contain the letter 'y' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a silver television a black couch a table and some ceiling fans'. How many words contain the letter 's' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'a parking voucher machine on a snowcovered sidewalk'. How many words contain the letter 'j' in the sentence.

Ex Output:

0