<|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:
5.3 5.3 5.3
140 132 63
Nb
0.81 0.00 0.18
Nb
0.00 0.15 0.36
Co
0.00 0.00 0.00
Bi
0.00 0.00 0.54
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
5.3 5.3 5.3
140 132 63
Nb
0.81 0.00 0.18
Nb
0.00 0.15 0.36
Co
0.00 0.00 0.00
Bi
0.00 0.00 0.54
Identify the crystal system.