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: 'a man holding a tennis racket with a white hat'. Remove all words of length '7' in the given sentence.
a man a tennis racket with a white hat

Sentence: 'two cows head to head with a bird perched on one of them'. Remove all words of length '7' in the given sentence.

two cows head to head with a bird on one of them