How to make serial items unique to every inventory organization?

Dear All Experts,

We need to use the serial numbers for every items. As we have more than 20 inventory organizations.Now suppose Item no 1, 2 3 & 4 are using in all inventory orgs so we need to generate the serial no while receiving the items through receipt. But the generation of items serials will be unique in all inventory org like:

Item 1, 2 , 3 & 4 when ever received the serial no will be start from 0001 for every item on all org. As item one is received first in Org AA with serial 0001 to 0010, and if same item is going to be received in other inventory org BB but the serial no should be 0011 and so on. If a serial no is used in any inventory org than that no can not be used to any other org. Serial no of items should be generated on master organization.