2.3 SQUARE SQUARE SQUARE SQUARE SQUARE SQUARE inactive inactive inactive inactive inactive inactive inactive inactive active inactive inactive active inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive active inactive inactive inactive inactive inactive active inactive active inactive active inactive inactive active inactive active inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive active inactive inactive inactive active inactive active inactive inactive inactive active inactive inactive inactive active inactive inactive active inactive inactive active active inactive inactive inactive inactive inactive inactive inactive active inactive inactive inactive inactive inactive inactive inactive inactive inactive active inactive inactive inactive inactive inactive inactive inactive active inactive inactive inactive active inactive inactive active inactive inactive inactive inactive inactive inactive inactive inactive active inactive inactive inactive active inactive inactive active inactive inactive inactive active inactive inactive inactive inactive inactive inactive inactive active active inactive inactive inactive inactive inactive inactive inactive active inactive inactive active inactive inactive active inactive inactive active inactive active inactive inactive inactive inactive inactive active inactive active inactive inactive inactive active inactive active inactive active inactive active inactive active inactive active inactive active inactive inactive inactive active inactive active inactive active inactive active inactive active active active inactive inactive inactive active active active inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive active inactive inactive inactive active active active inactive inactive inactive active inactive inactive inactive inactive inactive inactive active inactive inactive active active inactive active inactive inactive inactive inactive active inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive active inactive inactive inactive inactive active active inactive active inactive active inactive inactive inactive active inactive active active inactive inactive inactive inactive inactive active active inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive active inactive inactive inactive active inactive inactive inactive inactive inactive inactive active inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive active inactive active inactive active inactive active inactive inactive inactive inactive inactive inactive active inactive inactive inactive inactive inactive inactive active inactive inactive active active inactive inactive active inactive inactive active inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive active inactive inactive inactive inactive inactive inactive inactive active inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive active inactive inactive active active inactive inactive inactive inactive inactive active inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive inactive active active inactive inactive inactive active inactive inactive inactive active active inactive inactive inactive inactive inactive inactive active