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

[EX Q]: Sentence: 'a pair of tennis players on a tennis court'. How many words contain the letter 'u' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a small terrier stands in the open suitcase ready to go'. How many words contain the letter 'l' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a little girl that is sitting down and eating'. How many words contain the letter 'h' in the sentence.
[EX A]:
1