1-2-3-4-5-6-7-8-9-10

Dua-gu and dua-kim had to attend a wedding dinner today. Dua-gu told me " it's 7 now, you count to 10 oçlock and I will be back."
When they both walked towards the lift, I sat infront of the main gate and counted : "1-2-3-4-5-6-7-8-9-10"but dua-gu and dua-kim didn't come back.