In this task, you need to reverse 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 watches two giraffes eating from a box'. Reverse all words of length '4' in the given sentence.
a man watches two giraffes eating morf a box

Sentence: 'a person that is skateboarding on a ramp'. Reverse all words of length '13' in the given sentence.
a person that is gnidraobetaks on a ramp

Sentence: 'a red apple sitting on top of a table next to a knife'. Reverse all words of length '1' in the given sentence.

a red apple sitting on top of a table next to a knife