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

Ex Input:
Sentence: 'martha stewart holding a fluffy siamese cat on her arms'. How many words contain the letter 'a' in the sentence.

Ex Output:
6


Ex Input:
Sentence: 'zebra walking through some desolate savanna alone during the day'. How many words contain the letter 'e' in the sentence.

Ex Output:
5


Ex Input:
Sentence: 'a closeup of a zebra eating fresh green grass'. How many words contain the letter 'y' in the sentence.

Ex Output:

0