Two warring factions are trying to send secret messages to their comrades, but their communications are broadcast for the enemy to see. To keep their messages secret, each faction "encrypts" their messages using 4 keywords, known only to their comrades. Meanwhile, the enemy tries to intercept their messages by listening to their clues and figuring out the enemy's keywords. The first faction to intercept 2 messages from the other faction wins, unless a faction loses by miscommunicating 2 of their own messages.