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

[Q]: Sentence: 'a dog jumping up and catching a frisbee in its mouth'. How many words contain the letter 'r' in the sentence.
[A]: 1


[Q]: Sentence: 'a woman is posing next to a stop sign'. How many words contain the letter 'u' in the sentence.
[A]: 0


[Q]: Sentence: 'a black and white image of group of folks with their rackets'. How many words contain the letter 'm' in the sentence.
[A]:
1