Table schema:
CREATE TABLE table_name_26 (total_seats INTEGER, regional_seats VARCHAR, constituency_seats VARCHAR, party VARCHAR)

Question: What is the full number of Total Seats with a constituency seat number bigger than 0 with the Liberal Democrat party, and the Regional seat number is smaller than 6?
SQL: SELECT SUM(total_seats) FROM table_name_26 WHERE constituency_seats > 0 AND party = "liberal democrat" AND regional_seats < 6