Empty string

Every time you try to unclip a key from the keyboard, the battle begins: your fingers struggle, and the keys cling to their place as if they are soldiers refusing to surrender. You hear an annoying crackle… you fear the key will break, and you will lose the round. And here appears the small weapon: a tool you hold in your hand, storming the rows, and pulling out the key with a clean grip, without losses. A pure moment of victory… a loose key, a safe keyboard, and you are the commander in the key war.