Enter these codes at the Password screen. 

 3 Square, Square, Square, Triangle, X, Square, Circle, Triangle 
 4 Triangle, Circle, Square, Triangle, Circle, Square, Circle, X 
 5 X, Circle, X, Triangle, X, Square, Circle, X 
 6 Square, X, Triangle, Circle, Circle, Circle, Circle, X 
 7 X, Triangle, Circle, Circle, Circle, Square, Circle, X 
 8 Triangle, Triangle, Square, Circle, Circle, Square, Circle, X 
 9 X, Circle, X, Circle, X, X, Circle, X 
10 Triangle, Square, Triangle, Square, X, X, Circle, X 
11 Circle, Square, Circle, Square, X, X, Circle, X 
12 Square, Square, Square, Square, X, Square, Circle, Square 
13 X, X, X, Square, X, X, Circle, Square 
14 Square, Triangle, Circle, X, X, Triangle, Square, X 
15 Circle, Triangle, Square, X, X, Triangle, Circle, X 
16 Triangle, Triangle, X, X, X, Triangle, Square, X 
17 Square, X, Triangle, Triangle, Square, Triangle, Square, X 
18 X, X, Circle, Triangle, Square, Triangle, Square, X 
19 Triangle, X, Square, Triangle, Square, Triangle, Square, X 
20 Circle, X, X, Triangle, Square, Triangle, Square, X 
21 Square, Square, Triangle, Circle, Square, Triangle, Square, X 
22 X, Square, Circle, Circle, Square, Triangle, Square, X