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

Ex Input:
Sentence: 'a man flying through the air while riding a snowboard'. How many words contain the letter 'x' in the sentence.

Ex Output:
0


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: 'several ties hang from a bar in a closet'. How many words contain the letter 'e' in the sentence.

Ex Output:

3