<|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
138 138 59
Ca
0.00 0.00 0.00
Pt
0.00 0.00 0.79
W
0.00 0.94 0.39
W
0.94 0.00 0.39
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
5.5 5.5 5.5
138 138 59
Ca
0.00 0.00 0.00
Pt
0.00 0.00 0.79
W
0.00 0.94 0.39
W
0.94 0.00 0.39
Identify the crystal system.