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 smiling  woman wearing a hat holds up a snowboard'. How many words contain the letter 'b' in the sentence.
[A]: 1


[Q]: Sentence: 'a white building  in front of a street sign name jordan'. How many words contain the letter 'm' in the sentence.
[A]:
1