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