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

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

Output: 3


Input: Consider Input: Sentence: 'a name and clock lit up at night'. How many words contain the letter 'y' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a person that is riding a wave while surfing'. How many words contain the letter 'k' in the sentence.


Output: 0