<|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:
6.6 6.6 3.4
75 74 29
Mg
0.34 0.42 0.96
Ag
0.34 0.42 0.20
Pb
0.34 0.42 0.18
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
6.6 6.6 3.4
75 74 29
Mg
0.34 0.42 0.96
Ag
0.34 0.42 0.20
Pb
0.34 0.42 0.18
Identify the crystal system.