Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
approach =
1. –²
2. ο
3. •Ù
4. Šñ

ƒŒƒxƒ‹5. •ÏX
SDAL“‡‰pŒêŠwZ