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

Ex Input:
Sentence: 'a business man is talking on the phone'. How many words contain the letter 'e' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'a toilet sits in the middle of a street'. How many words contain the letter 'b' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a large bunch of green bananas on a tree'. How many words contain the letter 'a' in the sentence.

Ex Output:

4