Kim left for Vin

Paul's girlfriend Kim left him for a guy named Vin.Now he hates them even their name initials together in the form of "VK". He has no problem with "KV" . Paul has a string s . Paul wants to obtain a string without a substring "VK". So he makes some moves. In one move he can swap two adjacent letters of the string. It can be easily proved that it's possible for any initial string s. What is th