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

Sentence: 'a fire hydrant on a neighborhood street with trees and shrubs around it'. How many words contain the letter 'k' in the sentence.
0

Sentence: 'a girl is ready to serve the ball on a clay court'. How many words contain the letter 'd' in the sentence.
1

Sentence: 'a young man riding a snowboard down the side of a mountain'. How many words contain the letter 'w' in the sentence.

2