Welcome to your interview.
The question is on your right: Generate Country-Provider IDs. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
For each record, how would you design and generate a unique identifier in the format COUNTRYCODE-PROVIDER-SEQUENCENUMBER (for example, CAN-BNS-0001)?