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.

[EX Q]: Sentence: 'a very nice looking train in the dark'. Remove all words of length '7' in the given sentence.
[EX A]: a very nice train in the dark

[EX Q]: Sentence: 'a european army helicopter flying in the sky'. Remove all words of length '8' in the given sentence.
[EX A]: a army helicopter flying in the sky

[EX Q]: Sentence: 'the rear of train that is sitting in the grass'. Remove all words of length '7' in the given sentence.
[EX A]:
the rear of train that is in the grass