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

Input: Consider Input: Sentence: 'a woman is laughing while sitting on a bed'. How many words contain the letter 'c' in the sentence.

Output: 0


Input: Consider Input: Sentence: 'three people that are looking at a monitor on the left side of the photo'. How many words contain the letter 'd' in the sentence.

Output: 1


Input: Consider Input: Sentence: 'a young girl lays in bed while a young boy in the same bed looks at a man who is holding the covers'. How many words contain the letter 'r' in the sentence.


Output: 2