A long time ago, a man called Mr. Lebai lived on a river bank in a village in West Sumatra. One day, he received two party invitations-one from a villiager upstream and another one from downstream. The two parties' location were far from eachother. However, the parties were to take place exactly at the same time.

Not wanting to miss both parties, he started rowing his boat downstream for he knew that the food there was very delicious. In the middle of his journey, he stopped.

"I remember that the host from upstream gave more food to the guest. so maybe i should go there." said Mr. Lebai so he turned his boat back and started to row upstream.