<|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:
6.9 6.4 3.7
81 66 31
Ge
0.85 0.16 0.37
P
0.85 0.16 0.73
Br
0.85 0.16 0.08
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
6.9 6.4 3.7
81 66 31
Ge
0.85 0.16 0.37
P
0.85 0.16 0.73
Br
0.85 0.16 0.08
Identify the crystal system.