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 brown bear is standing at the base of the tree'. Remove all words of length '3' in the given sentence.

SOLUTION: a brown bear is standing at base of tree

PROBLEM: Sentence: 'a duck and baby ducks are in the blue water'. Remove all words of length '4' in the given sentence.

SOLUTION: a and ducks are in the water

PROBLEM: Sentence: 'a group of people playing frisbee in a field'. Remove all words of length '5' in the given sentence.

SOLUTION:
a of people playing frisbee in a