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

Ex Input:
Sentence: 'a pizza with sauce cheese and sausage sitting on a table'. How many words contain the letter 's' in the sentence.

Ex Output:
4


Ex Input:
Sentence: 'a person leaning on an elephant statue near trees'. How many words contain the letter 's' in the sentence.

Ex Output:
3


Ex Input:
Sentence: 'two women ride on an elephant led by a guide'. How many words contain the letter 'z' in the sentence.

Ex Output:

0