Database: insurance_fnol_minus_1_1
Question: List all the policy types used by the customer enrolled in the most policies.
SQL: select distinct t2.policy_type_code from customers_customers_policies as t1 join available_policies as t2 on t1.policy_id = t2.policy_id where t1.customer_name = ( select t1.customer_name from customers_customers_policies as t1 group by t1.customer_name order by count ( * ) desc limit 1 )