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

Ex Input:
Sentence: 'a person is riding a bicycle on the street'. How many words contain the letter 'b' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a small plain kitchen with a white stove and microwave'. How many words contain the letter 'h' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'traffic is moving in both directions on a bridge'. How many words contain the letter 'y' in the sentence.

Ex Output:

0