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

[Q]: Sentence: 'a person that is wearing glasses looking into a mirror'. How many words contain the letter 'f' in the sentence.
[A]: 0

[Q]: Sentence: 'a kitchen with a dining room table and a sitting area'. How many words contain the letter 'r' in the sentence.
[A]: 2

[Q]: Sentence: 'an arm is extended and bananas are lined up against it'. How many words contain the letter 'r' in the sentence.
[A]:
2