Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_63 (position INTEGER, club VARCHAR, goal_difference VARCHAR)
### Question:
What is the position of club Melilla CF, with a goal difference smaller than -10?
### Answer:
SELECT SUM(position) FROM table_name_63 WHERE club = "melilla cf" AND goal_difference < -10