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

[Q]: Sentence: 'a large airplane flying over a dry grass hillside'. How many words contain the letter 'e' in the sentence.
[A]: 4

[Q]: Sentence: 'a black and white photo of a plane sitting on a runway'. How many words contain the letter 'b' in the sentence.
[A]: 1

[Q]: Sentence: 'a subway train is parked on the train tracks'. How many words contain the letter 'c' in the sentence.
[A]:
1