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

Example Input: Sentence: 'a picture of a plane in the air'. How many words contain the letter 'l' in the sentence.
Example Output: 1

Example Input: Sentence: 'a man with baskets of goods stands next to his bicycle'. How many words contain the letter 'r' in the sentence.
Example Output: 0

Example Input: Sentence: 'some sort of white residue sprayed on a wall between two beds'. How many words contain the letter 'f' in the sentence.
Example Output:
1