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

Input: Consider Input: Sentence: 'a cat sitting on a wooden chair look at the camera'. How many words contain the letter 'd' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'watchful raptor standing on one foot on a rock pile'. How many words contain the letter 'r' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a giraffe stands underneath a tree in the grass'. How many words contain the letter 'u' in the sentence.


Output: 1