Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
boundary =
1. ‰‰
2. ‹«
3. ¸
4. z

ƒŒƒxƒ‹5. •ÏX
SDAL“‡‰pŒêŠwZ