The word "who's" is a contraction and does not belong in a regular dictionary, but online dictionaries do have contractions. That said, "who's" is listed first, being a contraction of "who" and "is"...
"its"definitely comes before "it's"
This is so, due to the fact that any punctuated word will usually follow the word without punctuation...that is, if they both bear the same letters in the same...