Definition: 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.
Input: Sentence: 'exactly how are both the dog and the person going to fit on that skateboard'. Remove all words of length '6' in the given sentence.

exactly how are both the dog and the going to fit on that skateboard