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

Input: Consider Input: Sentence: 'multiple birds on the ground in a parking lot'. How many words contain the letter 'm' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a close up of a business sign on a building'. How many words contain the letter 'y' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a transportation bus is driving on a road'. How many words contain the letter 'o' in the sentence.


Output: 3