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 feet wearing slippers pointed at the floor'. How many words contain the letter 'e' in the sentence.
[EX A]: 5

[EX Q]: Sentence: 'a young girl plays tennis in a court with grass in the cracks'. How many words contain the letter 'w' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a very old track standing besides a red  one'. How many words contain the letter 'b' in the sentence.
[EX A]:
1