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

Input: Consider Input: Sentence: 'a smiling  woman wearing a hat holds up a snowboard'. How many words contain the letter 'b' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a large pizza smothered in cheese and sauce'. How many words contain the letter 'a' in the sentence.

Output: 5


Input: Consider Input: Sentence: 'some cows walking across the grass and beside some trees'. How many words contain the letter 'f' in the sentence.


Output: 0