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

[EX Q]: Sentence: 'an older fighter plan sitting next to a group military men'. How many words contain the letter 'y' in the sentence.
[EX A]: 1

[EX Q]: Sentence: 'a large jetliner with a space shuttle on its back next to a fighter jet'. How many words contain the letter 'm' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'the elephant with long tusks walks through short grass'. How many words contain the letter 'k' in the sentence.
[EX A]:
2