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 man is riding a motorcycle down the street'. Remove all words of length '3' in the given sentence.
a is riding a motorcycle down street

Sentence: 'dog looks on outside of a travel bag on the back of a bicycle'. Remove all words of length '6' in the given sentence.
dog looks on outside of a bag on the back of a bicycle

Sentence: 'a giraffe near a couple trucks in a zoo'. Remove all words of length '7' in the given sentence.

a near a couple trucks in a zoo