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

[EX Q]: Sentence: 'unusual round vase with flower stems inside it'. How many words contain the letter 'c' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'the jet is flying through the sky during the day'. How many words contain the letter 'i' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a single flower branch bends towards the window'. How many words contain the letter 'n' in the sentence.
[EX A]:
4