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.

[Q]: Sentence: 'a small child with a helmet is on skis'. Remove all words of length '2' in the given sentence.
[A]: a small child with a helmet skis


[Q]: Sentence: 'a mountain towers over a train going down the tracks'. Remove all words of length '4' in the given sentence.
[A]: a mountain towers a train going the tracks


[Q]: Sentence: 'four vases with daffodils are placed on a shelf'. Remove all words of length '3' in the given sentence.
[A]:
four vases with daffodils placed on a shelf