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

Input: Consider Input: Sentence: 'adults with helmets sitting on tricycles made for children'. How many words contain the letter 'r' in the sentence.

Output: 3


Input: Consider Input: Sentence: 'a person that is fixing a pillow on a couch'. How many words contain the letter 's' in the sentence.

Output: 2


Input: Consider Input: Sentence: 'a close up photo of a baby giraffe standing in the hay'. How many words contain the letter 'q' in the sentence.


Output: 0