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

Input: Consider Input: Sentence: 'a skier posing for a photo in front of a slope'. How many words contain the letter 'a' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'many different species of sheep in display at a museum'. How many words contain the letter 'p' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a laptop computer sitting on top of a desk'. How many words contain the letter 'a' in the sentence.


Output: 3