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 small child with a helmet is on skis'. Remove all words of length '2' in the given sentence.
a small child with a helmet skis

Sentence: 'a castleesque building and its barren surroundings caked with snow'. Remove all words of length '12' in the given sentence.
a castleesque building and its barren caked with snow

Sentence: 'a person dressing in a warrior costume on a cell phone'. Remove all words of length '6' in the given sentence.

a dressing in a warrior costume on a cell phone