Tilings with coloured interlacing

data18/W85 data183/P201 data183/RE3559 data183/SPA0107 data183/WOK1 data184/VA1 data184/VA3 data188/SIVAS3 data188/SIVAS4 data189/IRA2633 data191/SPA0807 data192/IRA2004 data194/BUR1 data194/SA1 data21/P17 data7/N86A
This is new to version 17 and required an enhancement to the software used to construct the graphics. The interlacing is not ignored in computing the symmetry group.

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