There is no viable option. "Face saving" would include retaining some of the territory that Putin invaded since 2014, and that should never, and will never happen. Face saving may include a commitment from Zelenskyy to not join NATO. Even if such an agreement is reached, does Putin really think that NATO will stop supplying Ukraine with weapons and intelligence going forward? Ukraine will simply become the new Finland—before Putin screwed the pooch and woke up the sleeping NATO giant.