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

[EX Q]: Sentence: 'a woman is posing next to a stop sign'. How many words contain the letter 'u' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a fresh flower on a table in a piture of water'. How many words contain the letter 'n' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a cow standing on top of a grass covered field'. How many words contain the letter 'y' in the sentence.
[EX A]:
0