Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
prevent =
1. •n
2. –h
3. k
4. ŒÌ

ƒŒƒxƒ‹5. •ÏX
SDAL“‡‰pŒêŠwZ