将这些数字从小到大排列：3,512; 3,125; 3,215; 3,251。

• 3,125; 3,215; 3,251; 3,512
• 3,215; 3,125; 3,251; 3,512
• 3,125; 3,251; 3,215; 3,512
• 3,215; 3,251; 3,125; 3,512