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

[EX Q]: Sentence: 'people walking down the sidewalk with no turn signs'. How many words contain the letter 'e' in the sentence.
[EX A]: 3

[EX Q]: Sentence: 'a street scene with cars and an city bus'. How many words contain the letter 's' in the sentence.
[EX A]: 4

[EX Q]: Sentence: 'a couple of men riding skis on a snow covered slope'. How many words contain the letter 'r' in the sentence.
[EX A]:
2