Š¿Žšƒ‚ƒoƒCƒ‹ƒQ[ƒ€
Žc”O
period of time =
1. Z
2. Šú
3. •ú
4. ‹æ

ƒŒƒxƒ‹3. •ύX
SDAL“‡‰pŒêŠwZ