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.

Sentence: 'business signs hanging over sidewalk in city area'. Remove all words of length '4' in the given sentence.
business signs hanging sidewalk in

Sentence: 'some people are sitting and playing wii in a family room'. Remove all words of length '3' in the given sentence.
some people sitting playing in a family room

Sentence: 'a person standing on top of a ski slope wearing skis'. Remove all words of length '4' in the given sentence.

a person standing on top of a ski slope wearing