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 business man is talking on the phone'. How many words contain the letter 'e' in the sentence.
[A]: 3


[Q]: Sentence: 'elephants look at each other as they stand in a group'. How many words contain the letter 'c' in the sentence.
[A]:
1