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

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: 'the beach has six open umbrellas on poles'. How many words contain the letter 'g' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'a man wearing glasses is typing on a computer'. How many words contain the letter 'c' in the sentence.


Output: 1