Take the first name, surnamed Zhang, and grade the girls with jade characters.

as follows:

1. Zhang Yuyi, Zhang Yuyao and Zhang Yuyan.

2. Zhang Yucen, Zhang Yuhe and Zhang Yuxue.

3. Zhang Yuyi, Zhang Yuying, Zhang Yuyue.

4. Zhang Yuwei, Zhang Yuxuan, Zhang Yuting.

5. Zhang Yuzhi, Zhang Yuyan, Zhang Yuyan.

6. Zhang Yushu, Zhang Yushu and Zhang Yulan.