ceukok fruit

Do you know, there is a unique fruit originally comes from Aceh. It is one of Acehnese native fruit. The name is "ceukok". Nowadays, ceukok is come to be difficult to find . At the village, we could fine any kind of people who knows about this fruit.
The ceukok looks like a ping pong ball. The seeds take after grape but two times in size. The taste is close to sapodilla fruit (sawo) plus a bit of sour.
As one of my fav fruit when i was young, ceukok has the same color to cherry fruit.
I am so sorry about the image because actually i forget where i keep whether in my mobile phone or my flash disk.