No one can tell you the answer, as just by checking the reg# just of last month in February, there is no pattern which 777 will be flown on which day, that means different 777 every single day, short haul intra asia routes don't use a fixed config plane. Someone will tell you today is such and such, tomorrow will be a different one, so there is no point even to ask, and we had already letting you know which config that is possible for this route.

Besides, why do you care so much ? It is a 5 hours flight not 10+ hours long haul, just be glad the agent assign you with the F seat.