A building was erected with only one purpose - to create puzzles for scholars and geniuses who want develop their talent and skills in the art of puzzle solving. This building is very big with several tricky rooms. As a puzzle solver, you are dying to enter the premises of the building. Although you were granted entrance, joining the activity inside is difficult. Before you can reach the main room where all participants are gathered, you must pass the initial stage. You must enter the correct door in an array of doors. You are given one chance only. You fail, you flank.