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

[EX Q]: Sentence: 'a bus station full of people walking on the side walk'. How many words contain the letter 'q' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a man is sitting in a cubicle with a computer'. How many words contain the letter 'a' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'a small white dog is sitting on a wood bench'. How many words contain the letter 'y' in the sentence.
[EX A]:
0