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

[EX Q]: Sentence: 'the boy is in batting stance to waiting'. How many words contain the letter 'h' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'skate boarder trying to maintain his balance during stunt'. How many words contain the letter 'w' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'adults with helmets sitting on tricycles made for children'. How many words contain the letter 'r' in the sentence.
[EX A]:
3