which presidents of finland are listed?
k. j. stahlberg, lauri kristian relander, p. e. svinhufvud, kyosti kallio, risto ryti, gustaf mannerheim, j. k. paasikivi, urho kekkonen, mauno koivisto, martti ahtisaari, tarja halonen, sauli niinisto
of those, which resigned?
kyosti kallio, risto ryti, gustaf mannerheim, urho kekkonen
of those, which did not resign due to poor health?
risto ryti