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

Input: Consider Input: Sentence: 'a person in the air on skis on a mountain slope'. How many words contain the letter 'w' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'an image of a person holding a blunt object is rendered in red and blue tones'. How many words contain the letter 'x' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'country fried steak with mushrooms and broccoli and a roll'. How many words contain the letter 'a' in the sentence.


Output: 4