Your question is Generate Country-Provider IDs. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
For each record, how would you design and generate a unique identifier in the format COUNTRYCODE-PROVIDER-SEQUENCENUMBER (for example, CAN-BNS-0001)?