Silk printed combinations: ABC ABD ABE ABF ACB ACD ACE ACF
ADB ADC ADE ADF AEB AEC AED AEF AFB AFC
AFD AFE BAC BAD BAE BAF BCA BCB BCD BCE
BCF BDA BDC BDE BDF BEA BEC BED BEF
BFA BFC BFD BFE CAB CAD CAE CAF CBA CBD
CBE CBF CDA CDB CDE CDF CEA CEB CED
CEF CFA CFB CFD CFE DAB DAC DAE DAF DBA
DBC DBE DBF DCA DCB DCE DCF DEA DEB
DEC DEF DFA DFB DFC DFE EAB EAC EAD EAF
EBA EBC EBD EBF ECA ECB ECD ECF EDA
EDB EDC EDF EFA EFB EFC EFD FAB FAC FAD
FAE FBA FBC FBD FBE FCA FCB FCD FCE
FDA FDB FDC FDE FEA FEB FEC FED.
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