<|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:
2.7 2.7 8.8
90 90 90
Si
0.00 0.00 0.00
Ag
0.36 0.36 0.20
Ag
0.36 0.36 0.58
Ru
0.00 0.00 0.39
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
2.7 2.7 8.8
90 90 90
Si
0.00 0.00 0.00
Ag
0.36 0.36 0.20
Ag
0.36 0.36 0.58
Ru
0.00 0.00 0.39
Identify the crystal system.