Yu-Gi-Oh! - Duel 031

Reason for challenge
Yugi and company have now entered the mansion. They are sealed in because the front door is sealed shut and the staircase leads only to the ceiling. Yugi finds a scrap of paper with the word "blood" written on it. On one wall, they find four holes with numbers written above them: 00, 01, 10, 11. When they stick their hands in, clamps hold their wrists in place. They glance up to notice a guillotine blade.

Rules

 * Only one of the switches is real, and only one can be pressed.
 * If they press the wrong switch, the blade will drop and sever their hands.
 * They have five minutes to decide which switch to press.

The game

 * The friends study the numbers.
 * Yugi pulls out the scrap of paper, which is the hint of which switch to press.
 * He looks at the word "blood". There appear to be two L's.
 * Five minutes have passed. The blade starts to fall.
 * Yugi figures out the real switch. Tèa presses her switch (11) and the blade stops.
 * The clamps release their hands.
 * Yugi explains how he figured out everything. He explains that the word "blood" was made using only ones and zeroes. The extra L is really an arrow pointing downward, and the right switch was the one that the arrow was drawn on.
 * There is an exit trapdoor in the floor. No Penalty Game needed.