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

[EX Q]: Sentence: 'some elephants in a field of grass near a tree'. How many words contain the letter 'k' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'the corner of a bathroom with washrags and cleaning supplies'. How many words contain the letter 'q' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a train approaches on a set of snowy tracks'. How many words contain the letter 'a' in the sentence.
[EX A]:
5