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.
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Question: Sentence: 'a brown bear is standing at the base of the tree'. Remove all words of length '3' in the given sentence.

Answer: a brown bear is standing at base of tree


Question: Sentence: 'a bird perched on a wood rail by itself'. Remove all words of length '7' in the given sentence.

Answer: a bird on a wood rail by itself


Question: Sentence: 'a large white horse standing on top of a grass covered field'. Remove all words of length '8' in the given sentence.

Answer:
a large white horse on top of a grass covered field