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

Input: Consider Input: Sentence: 'a line of portable toilets stands outdoors under trees'. How many words contain the letter 'l' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a group of men sitting by tables working on laptops'. How many words contain the letter 'l' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a brown horse carrying a cart moving on the street'. How many words contain the letter 'n' in the sentence.


Output: 4