In which country the post of President and Prime Minister got exchanged between two persons?

Answer :- Russia
Related Facts

• In the election held in Russia the former Prime Minister Vladimir Putin was elected the President of the country. Earlier the former Russian President Dimitry Medvedev was elected as the Prime Minister of Russia. Putin had already served as the President of Russia 2 terms.
• The term of Russian President has been extended to six years from four year. Formerly only 2 terms were allowed for the Russian President. But in order to provide Putin more terms it has been extended to 4 terms. So now Putin can continue as Russian President till 2018 and he has option of running for a 4 term as well.