'Hello, how to surrender?' – Russian forces are retreating, Ukrainian – advancing. What comes next?

Ukrainian Armed Forces are regrouping for a further advance at the moment as of September 18. After successfully having pushed the Russian occupation forces out of the Kharkiv region. Russians are preparing for the 'regrouping actions' in the Kherson region now and building pontoon bridges out of railroad wagons. The desperate positions of the occupants are even more complex because of the constant strikes of Ukrainian guerrilla fighters