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

[EX Q]: Sentence: 'a man and a woman stand under an umbrella'. How many words contain the letter 's' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a woman standing in the dirt looking up at an elephant'. How many words contain the letter 'b' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a woman taking a swing at a tennis ball'. How many words contain the letter 'r' in the sentence.
[EX A]:
0