难难难，自留地。
323：01,02,03,10,11,12,13,17,22,25,26,29,30,34,35,37,38,46,47,49,（共20个）
322：04,07,08,09,16,18,19,21,22,27,28,30,31,34,35,39,40,43,44,45,（共20个）羊47 ×
321：04,08,09,14,16,18,19,23,26,27,28,31,32,35,38,39,40,44,45,47,（共20个）羊23 √
320：01,02,04,08,12,13,16,17,20,21,26,28,29,30,37,38,40,44,48,49,（共20个）虎28 √
