<|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:
4.5 6.4 6.4
37 90 90
Y
0.23 0.00 0.03
Y
0.00 0.00 0.22
Bi
0.23 0.00 0.90
As
0.00 0.00 0.04
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
4.5 6.4 6.4
37 90 90
Y
0.23 0.00 0.03
Y
0.00 0.00 0.22
Bi
0.23 0.00 0.90
As
0.00 0.00 0.04
Identify the crystal system.