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

Ex Input:
Sentence: 'a name and clock lit up at night'. How many words contain the letter 'y' in the sentence.

Ex Output:
0

Ex Input:
Sentence: 'a young man attempting to fly a kite on a forest hillside'. How many words contain the letter 'f' in the sentence.

Ex Output:
2

Ex Input:
Sentence: 'a long silver commuter bus driving down a curvy road'. How many words contain the letter 'l' in the sentence.

Ex Output:
2