In front of Louis there are 10 boxes containing different foods: tomatoes, (red) herrings, and bananas.
The boxes are arranged side by side in a line. Right next to the last box are three bigger containers extending this line. His job is to put these boxes into the containers, sorted by food. At his disposal: a crane which can only move horizontally and can pick up and put down one box at a time.
Louis wants to move the boxes a little as possible. Before doing anything, he makes a simplified drawing of his situation, to figure out the best way to move them on paper.