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

[Q]: Sentence: 'a man holding an owl in a lush green field'. How many words contain the letter 'y' in the sentence.
[A]: 0


[Q]: Sentence: 'a clock tower next to a building in a city'. How many words contain the letter 'a' in the sentence.
[A]: 3


[Q]: Sentence: 'two men who are in the water with surfboards'. How many words contain the letter 'u' in the sentence.
[A]:
1