Table: athletics_1951_pan_american
Columns: rank
nation
gold
silver
bronze
total

Question: What is the lowest total metals of a team with more than 6 silver, 6 bronze, and fewer than 16 gold medals?
SQL: SELECT MIN("total") FROM athletics_1951_pan_american WHERE "silver" > 6 AND "bronze" = 6 AND "gold" < 16