(COMBO) This combination of pictures created on December 05, 2019 shows (FILES) In this file photo taken on November 04, 2019 Russian President Vladimir Putin attends an awards ceremony marking the National Unity Day at the Kremlin in Moscow. (FILES) In this file photo taken on April 19, 2019 Ukrainian presidential candidate Volodymyr Zelensky speaks during a presidential election debate at Olimpiyski stadium in Kiev. - When Vladimir Putin and Volodymyr Zelensky meet for the first time, it will be an encounter between two very different presidents -- one an establishment strongman with years of experience, the other a neophyte rebel just learning the ropes. The Russian and Ukrainian presidents will be holding their first face-to-face talks in Paris on December 9, 2019 at a summit with French President Emmanuel Macron and German Chancellor Angela Merkel on the conflict in eastern Ukraine. (Photo by Evgenia NOVOZHENINA and Sergei CHUZAVKOV / various sources / AFP)