SAP PI Message Mapping split at item level

Dear Experts,

My requirement is to get order details from sap and send it to 2 receiver systems.

For e.g., if I am getting order with 5 line items then 1 3 and 5 should go to receiver A amd line 2 and 4 should go to receiver B.

Everytime line items will varry setimes 5 sometimes 10 etc.

How to handle it at mapping level???

BR,

Rashmi