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

[Q]: Sentence: 'young girls with backpacks are standing near stairs that look to go to the subway'. How many words contain the letter 'r' in the sentence.
[A]: 4


[Q]: Sentence: 'a person in a helmet riding a skateboard'. How many words contain the letter 'c' in the sentence.
[A]: 0


[Q]: Sentence: 'three monkeys sit on a fence eating bananas'. How many words contain the letter 'q' in the sentence.
[A]:
0