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

Ex Input:
Sentence: 'a sign reading butt street on the corner of a building with a no parking sign below it'. How many words contain the letter 'h' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'this bus waits at a bus station for passengers to board'. How many words contain the letter 'e' 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