 Complete the following phrase:  Nikolchenko made her World Cup Challenge debut at the 2018 Guadalajara World Challenge Cup, where she finished 5th in the all-around, 4th in hoop and 4th in ribbon. She also took part in the Holon Grand Prix, where she also placed 5th in all-around and won the silver medal for hoop and clubs. At the 2018 European Championships, Nikolchenko finished 11th. At the 2018 Minsk World Challenge Cup, she placed 5th in the all-around and qualified to three finals. She won bronze with hoop, finished 4th in ribbon and 6th in ball. At the 