What was the aggregate score of the matchup with a leg 2 of 72-64?
CREATE TABLE table_63989 (
    "Team #1" text,
    "Agg." text,
    "Team #2" text,
    "1st leg" text,
    "2nd leg" text
)
SELECT "Agg." FROM table_63989 WHERE "2nd leg" = '72-64'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What was the aggregate score of the matchup with a leg 2 of 72-64? ### Input: CREATE TABLE table_63989 (
    "Team #1" text,
    "Agg." text,
    "Team #2" text,
    "1st leg" text,
    "2nd leg" text
) ### Response: SELECT "Agg." FROM table_63989 WHERE "2nd leg" = '72-64'