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U: 
Symmetries (restricted to the containing plane):
Mirror symmetric
Eight configurations for this shape
(click on the configuration code for building instructions):
1: U-1 
[Symmetries of a rectangle]
2: U-2 
[Symmetries of a rectangle]
3: U-3 
[Mirror symmetric]
4: U-4 
[Symmetries of a rectangle]
5: U-5 
[Symmetries of a rectangle]
6: U-6 
[Mirror symmetric]
[Symmetries of a rectangle]
[Symmetries of a rectangle]
[Mirror symmetric]
[Symmetries of a rectangle]
[Symmetries of a rectangle]
[Mirror symmetric]