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 small children ski down a snowy tree lined slope'. Remove all words of length '4' in the given sentence.
two small children ski a snowy lined slope

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: 'two policemen on horseback ride through a park'. Remove all words of length '9' in the given sentence.

two on ride through a park