<|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:
4.9 4.9 3.5
90 90 119
Y
0.00 0.82 0.75
Si
0.00 0.00 0.00
Br
0.44 0.41 0.75
Identify the crystal system.<|im_end|>
<|im_start|>assistant
Given the following crystal representation:
4.9 4.9 3.5
90 90 119
Y
0.00 0.82 0.75
Si
0.00 0.00 0.00
Br
0.44 0.41 0.75
Identify the crystal system.