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 man is crouched down by a big elephant'. Remove all words of length '3' in the given sentence.
a is crouched down by a elephant

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 batter waiting for a pitch with the umpire and catcher behind him'. Remove all words of length '3' in the given sentence.

a batter waiting a pitch with umpire catcher behind

