Question: difference between flowers for algernon short story and novel

title: Flowers for Algernon
text: A 1961 television drama , The Two Worlds of Charlie Gordon , starring Cliff Robertson . A 1968 film , Charly , also starring Cliff Robertson , for which he won the Academy Award for Best Actor . A 1969 stage play , Flowers for Algernon by David Rogers . A 1978 stage musical , Charlie and Algernon by David Rogers and Charles Strouse . A 1991 radio play , Flowers for Algernon , for BBC Radio 4 starring Tom Courtenay A 2000 television movie , Flowers for Algernon , starring Matthew Modine . A 2002 Japanese drama , Algernon ni Hanataba wo for Fuji Television , starring Yūsuke Santamaria . A 2006 French television movie , Des fleurs pour Algernon . A 2015 Japanese drama , Algernon ni Hanataba wo for Tokyo Broadcasting System , starring Yamashita Tomohisa and Chiaki Kuriyama .