Ukraine wants the return of Crimea (out of the question) and the Donbas (almost equally unlikely).Neither of those things will happen. If you focus on the possible, it's easier to understand the solution.Russia says it wants the whole of Ukraine.
“Russia says it wants the whole of Ukraine.”
No, they have not said that...ever.
“Russia says it wants the whole of Ukraine.”
Russia has only demanded 20 to 35 percent of Ukraine, although they do want the rest of the country not to pose a threat to them or to the Russians living there.