That heart on the LOT Dreamliner is the logo of "Wielka Orkiestra Świątecznej Pomocy" which is a Polish charity association that raises money mainly for hospitals in Poland.
So that text in the heart at the 787 of lot polish airlines means "great orchestra of Christmas help". It is a charity which organises an event every year when people can buy stuff and all that money goes to poor/ill people.
I buy my models at www.aviationmegastore.com/en/ Here is a video where I give all the information you need ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Pd4om_MGlxg.htmlsi=7XrrT2Fps1t4x_ZK