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

Example Input: Sentence: 'a tree by a house has a traffic sign attached to it'. How many words contain the letter 'm' in the sentence.
Example Output: 0

Example Input: Sentence: 'a jet airliner carrying a small shuttle above it'. How many words contain the letter 'r' in the sentence.
Example Output: 2

Example Input: Sentence: 'a view of someones shoes hanging on the power lines in the city'. How many words contain the letter 'b' in the sentence.
Example Output:
0