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

Ex Input:
Sentence: 'a cat is laying in a piece of luggage'. How many words contain the letter 'p' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'a couple of lambs that are in the dirt'. How many words contain the letter 'l' in the sentence.

Ex Output:
2


Ex Input:
Sentence: 'a road sign that says end and a couple trees in the background'. How many words contain the letter 'p' in the sentence.

Ex Output:

1