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