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 man in a tie that is looking to the side'. How many words contain the letter 'm' in the sentence.

Output: 1

Input: Consider Input: Sentence: 'the men are enjoying a meal together by the window'. How many words contain the letter 'j' in the sentence.
Output: 1