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 mother zebra standing next to a baby zebra'. How many words contain the letter 'e' in the sentence.
[A]: 4


[Q]: Sentence: 'an old style stove in the corner of a dark room'. How many words contain the letter 'y' in the sentence.
[A]:
1