Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
difficult =
1.
c
2.
“ï
3.
ŽÌ
4.
Ӈ
ƒŒƒxƒ‹6.
•ÏX
SDAL“‡‰pŒêŠwZ