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

[Q]: Sentence: 'a white cat looking in a rectangular mirror in a female bedroom'. How many words contain the letter 'q' in the sentence.
[A]: 0

[Q]: Sentence: 'a woman in a wheelchair is about to play tennis'. How many words contain the letter 'r' in the sentence.
[A]: 1

[Q]: Sentence: 'steam locomotive pulling a long load of freight past a few bystanders'. How many words contain the letter 'r' in the sentence.
[A]:
2