Context: The film opens with a man, Alderson (Julian Richings), waking up in a cube-shaped room with glowing, computer circuit-like walls and six doors, one at the center of each wall, ceiling and floor. After recovering from his confusion, he opens two of the doors and looks into them to find rooms that differ to the one he is in only by color. He then opens and goes through a third door. He looks around and then takes a step, but is suddenly cut into large cubes. He falls apart and the rack of crosshatched wires which diced him moves into view. It folds up and retracts.Later, in another room, several people find each other: Quentin (Maurice Dean Wint), Worth (David Hewlett), Holloway (Nicky Guadagni), Rennes (Wayne Robson), and Leaven (Nicole de Boer). None of them know where they are, how they got there, or why they are there. Quentin, however, knows that there are traps, as he had looked into a room and nearly got his head cut off. The five decide to stay together and look for the way out. Rennes takes the lead. He exemplifies how to test for traps by tossing a boot into the rooms while holding onto the laces, to trigger potential traps, figuring that the trapped room contains motion detectors. Holloway speculates on several possible creators of the Cube, being aliens or the government his main ptions. Rennes remarks that staying still will not solve anything, and says that they should move in a straight line until they get to the end. The others agree, and they begin moving through the rooms.While moving, they discover a series of different numbers on the hatchways between each of the rooms. At one point, Rennes throws the boot in and does not find anything, but detects that the room has dry air, and deduces that it most likely employs an electrochemical sensor, which detects hydrogen sulphide emitted from the skin. Quentin realizes that Rennes is an escape artist who has escaped more than seven major prisons. Soon after, Rennes jumps into a room tested with a boot, and is sprayed in the face with acid. The others pull him back, but he dies as the acid corrodes his face and the inside of his head. The group decides that the room must have contained an electrochemical sensor which Rennes missed, and realize that they must find a better way of testing the rooms.Quentin asks everyone about their occupations. He says he is a police officer, Holloway says she is a doctor, and Worth says he works "in an office building, doing office building stuff." Leaven claims simply to "hang out" with her friends. Quentin believes that nothing is a coincidence, that each of them has a purpose in the cube. After Holloway talks about her rings and broaches, Quentin asks why Leaven has her glasses, while Holloway has had her jewellery taken away. Leaven reveals herself to excel at mathematics, and after looking at the numbers on a crawlspace, theorizes that when one of those numbers is prime, the room is booby-trapped.Leaven's purpose becomes attempting to "crack the Cube's code", and they progress through the cubes. When they find themselves in a room with trapped rooms all around and below, Quentin checks the door in the ceiling, through which falls a seventh person: Kazan (Andrew Miller). He appears to be mentally handicapped. At least two of the others see him as a burden, but Holloway decides to bring him along.The group starts speculating about their surroundings, which causes a conflict between Quentin and Holloway. Quentin dismisses Holloway's ideas as conspiracy theories, and Holloway thinks that Quentin is naive. Soon after this, Quentin enters a room without prime numbers and narrowly avoids death from a trap consisting of rotating razor wires. Leaven's theory that non-prime-numbered rooms are safe is shown to be incorrect. Quentin begins suspecting that Worth is a spy, and is increasingly irritated by Kazan's mental state. The group rests, while Leaven attempts to decipher the numbers 
 Question: Who kills Leaven ?
Output: quentin