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

Example Input: Sentence: 'adults with helmets sitting on tricycles made for children'. How many words contain the letter 'r' in the sentence.
Example Output: 3

Example Input: Sentence: 'a pizza sitting on top of a black cutting board'. How many words contain the letter 'g' in the sentence.
Example Output: 2

Example Input: Sentence: 'people with bicycles and skateboards on a street'. How many words contain the letter 'o' in the sentence.
Example Output:
3