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

[EX Q]: Sentence: 'the tennis player returns a serve of the tennis ball'. How many words contain the letter 'q' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'some soldiers cutting into a big sheet cake on a table'. How many words contain the letter 'c' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'four cows are eating grass on a hillside'. How many words contain the letter 'u' in the sentence.
[EX A]:
1