A1 - (Easy)
A2 - (Medium)
A3 - (Hard)
B1 - (Easy)
B2 - (Medium)
B3 - (Hard)
C1 - (Easy)
C2 - (Medium)
C3 - (Hard)
D1 - (Easy)
D2 - (Medium)
D3 - (Hard)
E1 - (Easy)
E2 - (Medium)
E3 - (Hard)
F1 - (Easy)
F2 - (Medium)
F3 - (Hard)
G1 - (Easy)
G2 - (Medium)
G3 - (Hard)