According to the fairy tale of the same name by Radiy Polonskiy.
In the literary original, there were three guys: Antoshka, Lariska and Deniska. But the boy, the hero of the animation, even though its character is similar to Antoshka, is called Deniska for rhyme with Lariska.
The age of the heroes is also different - the book mentions that Lariska is not yet a pioneer (that is, she is an Octobrist) and, accordingly, younger than Deniska and Antoshka. In the film, Lariska and Deniska both say that they are pioneers, and, judging by their appearance, they are the same age.
The animated film was twice officially published for viewing: As part of the collection "I Love Cartoons - 9. The Secret of the Country of Strawberries" on a videotape of the VHS format, released in 2001 by VideoService Concern. As part of the collection "Three Panka. Collection of cartoons "on DVD, released in 2006 by the company" Master Tape ".