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

Input: Consider Input: Sentence: 'a laptop a table a mouse some dirt and water'. How many words contain the letter 'u' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'watchful raptor standing on one foot on a rock pile'. How many words contain the letter 'r' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'the cat is looking at its own reflection in the mirror'. How many words contain the letter 'h' in the sentence.


Output: 2