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.

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

Sentence: 'a man in a red jacket and hat crossing the street in front of silver car'. Remove all words of length '6' in the given sentence.
a man in a red and hat crossing the in front of car

Sentence: 'motorcycle in front of field of flowers with a bridge in the background'. Remove all words of length '1' in the given sentence.

motorcycle in front of field of flowers with bridge in the background