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