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

Ex Input:
Sentence: 'a crowd of people walking around a city street'. How many words contain the letter 'p' in the sentence.

Ex Output:
1


Ex Input:
Sentence: 'two zebras standing next to each other in the dried grass'. How many words contain the letter 'q' in the sentence.

Ex Output:
0


Ex Input:
Sentence: 'people are on a tennis court playing tennis'. How many words contain the letter 'n' in the sentence.

Ex Output:

4