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

[Q]: Sentence: 'two men are dancing in a parade with brown umbrellas'. How many words contain the letter 'r' in the sentence.
[A]: 4


[Q]: Sentence: 'a man holding a frisbee above a crowd of young men'. How many words contain the letter 'i' in the sentence.
[A]: 2


[Q]: Sentence: 'a man walking down a street holding a surfboard'. How many words contain the letter 'x' in the sentence.
[A]:
0