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

Input: Consider Input: Sentence: 'a dog jumping up and catching a frisbee in its mouth'. How many words contain the letter 'r' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'many different species of sheep in display at a museum'. How many words contain the letter 'p' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a parked blue and white motorcycle with a black seat'. How many words contain the letter 'd' in the sentence.


Output: 2