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

[Q]: Sentence: 'a boy is doing a trick with his skateboard'. How many words contain the letter 'y' in the sentence.
[A]: 1


[Q]: Sentence: 'a bird is standing on the edge of a book'. How many words contain the letter 'o' in the sentence.
[A]: 3


[Q]: Sentence: 'a line of buses are loading people onto them'. How many words contain the letter 'k' in the sentence.
[A]:
0