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

[EX Q]: Sentence: 'there are trains that are on the train track'. How many words contain the letter 'z' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a laptop a table a mouse some dirt and water'. How many words contain the letter 'u' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a pink flower sticks out of a narrow white vase'. How many words contain the letter 'e' in the sentence.
[EX A]:
3