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

[Q]: Sentence: 'three birds perched on top of a wire fence'. How many words contain the letter 'b' in the sentence.
[A]: 1


[Q]: Sentence: 'a apple that is sitting on top of a knife'. How many words contain the letter 'u' in the sentence.
[A]: 0


[Q]: Sentence: 'a very cute brown and white dog with shining eyes'. How many words contain the letter 'z' in the sentence.
[A]:
0