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 large flock of birds flying over a field next to a  tree'. Remove all words of length '2' in the given sentence.

SOLUTION: a large flock birds flying over a field next a tree

PROBLEM: Sentence: 'a set of of stairs leading into an airplane'. Remove all words of length '8' in the given sentence.

SOLUTION: a set of of stairs leading into an

PROBLEM: Sentence: 'a person stands in shallow water at the beach and looks at the ocean'. Remove all words of length '7' in the given sentence.

SOLUTION:
a person stands in water at the beach and looks at the ocean