Graph65_pwd_h_olding_strong

You've just found this old CASIO Graph65 calculator and are in awe with it, but something tickles your mind when you see a single program listed in its PRGM menu: it requires a password to view its content... You then remember this device was first sold back in 1996, decades before hardware security became a thing, and you hope that this password protection feature may not be as strong as it seems (and you may be right ;) ).

Find a way to recover the password and access this program's content without opening the calculator. An official copy of this calculator's user manual is provided here, if it can be useful. (CASIO renamed the fx-9850G calculator "Graph65" for the French market, but both run similar software).

The flag is built from the recovered password: FLAG{}.