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

Input: Consider Input: Sentence: 'a woman is hitting a tennis ball with her racket'. How many words contain the letter 'c' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a toilet sits in the middle of a street'. How many words contain the letter 'b' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a white vw bug with a surfboard mounted to its roof'. How many words contain the letter 'u' in the sentence.


Output: 3