In this task, you need to remove all words of a given length in the sentence. The number of letters in a word determine its length, for example, the length of the word "apple" is 5.
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Question: Sentence: 'a stack of donuts sitting on a piece of paper'. Remove all words of length '7' in the given sentence.

Answer: a stack of donuts on a piece of paper


Question: Sentence: 'a group of young people holding up voting signs along a street'. Remove all words of length '5' in the given sentence.

Answer: a of people holding up voting a street


Question: Sentence: 'a red train engine parked on top of a snow covered ground'. Remove all words of length '1' in the given sentence.

Answer:
red train engine parked on top of snow covered ground