Input (grade 13): Tibor Sekelj (in Hungarian: Székely Tibor) (14 February 1912 - 23 September 1988) was an explorer, esperantist, writer and lawyer of Jewish descent.
Output (grade 10): His main book on other cultures is Tirez the arrow: oral poetry of the world, Rotterdam: UEA, 1983, 187 pages, ISBN 92-9017-025-5.