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

[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: 'people holding a surfboard and walking down the beach'. How many words contain the letter 'n' in the sentence.
[A]: 4


[Q]: Sentence: 'a little girl that is flying a butterfly kite'. How many words contain the letter 'n' in the sentence.
[A]:
1