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

Ex Input:
Sentence: 'a large elephant is walking by some bars'. How many words contain the letter 'v' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'a woman standing on a beach near the water'. How many words contain the letter 'n' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'a tub with a rubber duck sits in front of a television'. How many words contain the letter 'f' in the sentence.

Ex Output:

2