CREATE TABLE table_name_81 (wins VARCHAR(255), losses VARCHAR(255), goal_difference VARCHAR(255), draws VARCHAR(255))
What is the total number of wins of the club with a goal difference less than 21, 4 draws, and less than 21 losses?
    
SQL: SELECT COUNT(wins) FROM table_name_81 WHERE goal_difference < 21 AND draws = 4 AND losses < 21