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

Input: Consider Input: Sentence: 'person standing in the grass striking a baseball with a bat'. How many words contain the letter 's' in the sentence.

Output: 5


Input: Consider Input: Sentence: 'a black and white photo of a plane sitting on a runway'. How many words contain the letter 'b' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a young boy swinging a baseball bat during a baseball game'. How many words contain the letter 'o' in the sentence.


Output: 2