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

Sentence: 'a man holding a skate board between legs'. Remove all words of length '3' in the given sentence.
a holding a skate board between legs

Sentence: 'a large bathroom with a mirror and a towel rack'. Remove all words of length '8' in the given sentence.

a large with a mirror and a towel rack