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 swinging a tennis racquet in the air'. How many words contain the letter 'z' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'some kids are all taking a photograph together'. How many words contain the letter 'e' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a group of people standing in rows with frisbees for a photo'. How many words contain the letter 'r' in the sentence.


Output: 4