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 train stopped on the track at a station'. Remove all words of length '2' in the given sentence.
answer:
a train stopped the track a station


question:
Sentence: 'a purple bus turning into a parking lot'. Remove all words of length '1' in the given sentence.
answer:
purple bus turning into parking lot


question:
Sentence: 'a man that is standing on a surfboard in the water'. Remove all words of length '4' in the given sentence.
answer:

a man is standing on a surfboard in the water