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

[EX Q]: Sentence: 'a person in uniform is on a motorcycle near other uniformed people'. How many words contain the letter 'r' in the sentence.
[EX A]: 6

[EX Q]: Sentence: 'a teddy bear that is sitting up on the ground'. How many words contain the letter 'm' in the sentence.
[EX A]: 0

[EX Q]: Sentence: 'a focused image of a red umbrella with an old wall in the background'. How many words contain the letter 's' in the sentence.
[EX A]:
1