iirc Putin swapped and became a prime minister for a short period in between.
> As he was then constitutionally limited to two consecutive terms as president, Putin served as prime minister again from 2008 to 2012 under Dmitry Medvedev, and returned to the presidency in 2012 in an election marred by allegations of fraud and protests; he was reelected again in 2018. In April 2021, following a referendum, he signed into law constitutional amendments including one that would allow him to run for reelection twice more, potentially extending his presidency to 2036.