Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the highest number of games won where less than 21 games were conceded and less than 18 games were actually played?

### Inputs:
table_name: table, columns: ['Place (Posición)', 'Team (Equipo)', 'Played (PJ)', 'Won (PG)', 'Draw (PE)', 'Lost (PP)', 'Goals Scored (GF)', 'Goals Conceded (GC)', '+/- (Dif.)', 'Points (Pts.)']

### Response:
SELECT MAX Won (PG) FROM table WHERE Goals Conceded (GC) < 21 AND Played (PJ) < 18