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

[EX Q]: Sentence: 'a pizza pie is on a wooden serving tray'. How many words contain the letter 's' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a lighthouse with birds flying by it at a bay'. How many words contain the letter 'q' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a young man smiles and holds a small teddy bear'. How many words contain the letter 'o' in the sentence.
[EX A]:
2