instruction:
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.
question:
Sentence: 'a mountain towers over a train going down the tracks'. Remove all words of length '4' in the given sentence.
answer:
a mountain towers a train going the tracks


question:
Sentence: 'traffic lights on a street on a building in the street'. Remove all words of length '1' in the given sentence.
answer:
traffic lights on street on building in the street


question:
Sentence: 'some elephants grazing around outside in front of  brick housing'. Remove all words of length '4' in the given sentence.
answer:

elephants grazing around outside in front of brick housing