Jan Wiktor Brzechwa (August 15, 1898 – July 2, 1966) was a Polish poet, author and lawyer, known mostly for his contribution to children's literature. His poetry was written mostly in the melodic style of the 8-syllable accentual verse, the most popular rhythmic structure among the Polish stylistic variations. In 1926 he published Oblicza zmyślone ("Imaginary visages"), his first book of poems. His first set of poems for children Tańcowała igła z nitką ("Danced the needle with the thread") was published in 1937. Among his most popular works is Chrząszcz (The Beetle), a poem proverbial for containing one the hardest-to-pronounce phrases in Polish literature. Its first line "W Szczebrzeszynie chrząszcz brzmi w trzcinie" (In the town of Szczebrzeszyn a beetle buzzes in the reeds) is the best known Polish tongue-twister, in which almost all of the consonants make distinct buzzing sounds. Brzechwa is also popular in Poland for having written a number of lyrical children's poems. He was a translator of Russian literature, translating works by Aleksandr Pushkin, Sergey Yesienin and Vladimir Mayakovskiy. Brzechwa also wrote a long-running series of children's books based on the adventures of Pan Kleks, the headmaster of a magical academy, and his students. Many of the Kleks books and plot points were made into a series of films in the 1980s, while the poem Pchła Szachrajka (Adventures of a Cheating Flea) was developed into an animated film in 1989.