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

Input: Consider Input: Sentence: 'a view from inside a train cart going down a track'. How many words contain the letter 'e' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'an old airplane sitting on top of a field'. How many words contain the letter 'h' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a woman in red sitting on a park bench'. How many words contain the letter 's' in the sentence.


Output: 1