<|im_start|>system
Please reason step by step, and put your final answer within \boxed{}.<|im_end|>
<|im_start|>user
Given the following crystal representation:
7.1 7.1 7.1
26 26 26
Be
0.00 0.00 0.00
Re
0.00 0.00 0.23
Se
0.00 0.00 0.28
Se
0.00 0.00 0.18
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
7.1 7.1 7.1
26 26 26
Be
0.00 0.00 0.00
Re
0.00 0.00 0.23
Se
0.00 0.00 0.28
Se
0.00 0.00 0.18
Identify the crystal system.