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

[EX Q]: Sentence: 'four white and blue street signs on a wooden pole'. How many words contain the letter 'u' in the sentence.
[EX A]: 2

[EX Q]: Sentence: 'an image of a man with a tennis racket in hand'. How many words contain the letter 'u' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'view from behind a tree of a lake and fall colored tress on the other side'. How many words contain the letter 'k' in the sentence.
[EX A]:
1