TASK DEFINITION: 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.
PROBLEM: Sentence: 'a stack of donuts sitting on a piece of paper'. Remove all words of length '7' in the given sentence.

SOLUTION: a stack of donuts on a piece of paper

PROBLEM: Sentence: 'six people with a dog in the snow'. Remove all words of length '6' in the given sentence.

SOLUTION: six with a dog in the snow

PROBLEM: Sentence: 'a person standing in a living room playing nintendo wii'. Remove all words of length '3' in the given sentence.

SOLUTION:
a person standing in a living room playing nintendo