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

Input: Consider Input: Sentence: 'a very big nice looking kitchen that is well lit'. How many words contain the letter 'r' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'bus parked next to a side walk on the road'. How many words contain the letter 'd' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a man holding a racquet hits a tennis ball'. How many words contain the letter 'v' in the sentence.


Output: 0