ftz.hackerschool.org

level1         hacker or cracker

level2         can you fly?
level3         suck my brain
level4         what is your name?
level5         what the hell
level6         come together
level7        break the world
level8        apple
level9        interesting to hack!               
level10       what!@#$? 
level11       it is like this   
level12       have no clue
level13       what that nigga want?
level14       guestt what
level15       about to cause mass
level16       king poetic
level17       why did you do it
level18       swimming in pink
level19       we are just regular guys
level20

머리속에서 겉돌기만하던 개념들이 어느순간에 깨끗하게 정리되는 느낌이 들었.. 풉..
format string 은 일단 패스