A brother and sister, warned of the upcoming flood by a mouse, sealed themselves inside a drum, and emerged again after the flood receded. They looked far and wide for mates, but they were the only survivors. A malcoha cuckoo sang to them, "brother and sister should embrace one another." They slept together. After seven years, the child was born as a gourd. A little later, hearing noises from the gourd, they burnt a hole in its shell, and people of the different races came out, first Rumeet, then Kammu, Thai, Westerner, and Chinese. [Lindell et. al., in Dundes]
or
References: Dundes, Alan (ed.) The Flood Myth, University of California Press, Berkeley and London, 1988.