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: 'a crowd of people with kites flying overhead'. Remove all words of length '4' in the given sentence.
a crowd of people kites flying overhead

Sentence: 'a person on some skis in the snow'. Remove all words of length '4' in the given sentence.
a person on in the

Sentence: 'a boy holds several tennis balls on his racket'. Remove all words of length '5' in the given sentence.

a boy several tennis on his racket