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

[EX Q]: Sentence: 'a keyboard on a table with a toothbrush a book some sunglasses and coffee'. How many words contain the letter 'e' in the sentence.
[EX A]: 5

[EX Q]: Sentence: 'people standing in a river surrounding an elephant some are touching it'. How many words contain the letter 'd' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'a guy playing tennis about to hit the ball'. How many words contain the letter 'b' in the sentence.
[EX A]:
2