<|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:
5.5 5.5 5.5
136 136 63
Sr
0.00 0.00 0.00
Sn
0.00 0.06 0.34
Ru
0.06 0.00 0.34
Ru
0.00 0.00 0.67
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
5.5 5.5 5.5
136 136 63
Sr
0.00 0.00 0.00
Sn
0.00 0.06 0.34
Ru
0.06 0.00 0.34
Ru
0.00 0.00 0.67
Identify the crystal system.