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

[Q]: Sentence: 'a hotdog is in a bun covered in cheese'. How many words contain the letter 'q' in the sentence.
[A]: 0


[Q]: Sentence: 'a man in a helmet leans on his motorcycle'. How many words contain the letter 'n' in the sentence.
[A]: 4


[Q]: Sentence: 'black cat sitting on a closed white toilet seat'. How many words contain the letter 'd' in the sentence.
[A]:
1