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_50 (fa_cup INTEGER, total VARCHAR, fa_trophy VARCHAR, club VARCHAR)
### Question:
What is the sum of FA cups of club Stalybridge Celtic, which has more than 0 FA trophies and a total less than 20?
### Answer:
SELECT SUM(fa_cup) FROM table_name_50 WHERE fa_trophy > 0 AND club = "stalybridge celtic" AND total < 20