<|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:
3.0 4.2 6.0
90 90 90
Al
0.00 0.00 0.00
Ag
0.49 0.10 0.60
Ag
0.49 0.10 0.37
Se
0.00 0.00 0.99
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
3.0 4.2 6.0
90 90 90
Al
0.00 0.00 0.00
Ag
0.49 0.10 0.60
Ag
0.49 0.10 0.37
Se
0.00 0.00 0.99
Identify the crystal system.