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 large flock of birds flying over a field next to a  tree'. Remove all words of length '2' in the given sentence.
answer:
a large flock birds flying over a field next a tree


question:
Sentence: 'a black and whit picture of someone on a skateboard'. Remove all words of length '1' in the given sentence.
answer:
black and whit picture of someone on skateboard


question:
Sentence: 'a red fire hydrant in a grass field'. Remove all words of length '4' in the given sentence.
answer:

a red hydrant in a grass field