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

[Q]: Sentence: 'a green and white street sign on a pole and a light'. How many words contain the letter 's' in the sentence.
[A]: 2


[Q]: Sentence: 'a clothing line with teddy bears hung by their ears'. How many words contain the letter 'n' in the sentence.
[A]: 3


[Q]: Sentence: 'a white plate topped with a slice of pizza'. How many words contain the letter 'k' in the sentence.
[A]:
0