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: 'two sheep stop to rest on top of a hill'. Remove all words of length '1' in the given sentence.
two sheep stop to rest on top of hill

Sentence: 'a purple bus turning into a parking lot'. Remove all words of length '1' in the given sentence.
purple bus turning into parking lot

Sentence: 'a black sheep is standing next to a group of white sheep'. Remove all words of length '8' in the given sentence.

a black sheep is next to a group of white sheep