a-a a-c a-q aaa aac aad aap aaq aax ac- aca acc acd acp acq acx ad- ada adc add adp adq adx ap- apa apc apd app apq apx aqa aqc aqp ax- axa axp axx c-- caa cac cad cap caq cax cca ccc ccd ccp ccx cda cdc cdd cdp cdq cdx cpa cpc cpd cpp cpq cpx cqa cqc cqd cxc cxp cxx daa dac dad dap daq dax dca dcc dcd dcp dcx dda ddc ddd ddp ddq ddx dpa dpc dpd dpp dqa dxc dxd dxp dxx p-p paa pac pad pap paq pax pca pcc pcd pcp pcq pcx pda pdc pdd pdp pdq pdx ppa ppc ppd ppp ppq ppx pqq pxc qaa qac qad qap qax qca qcc qcd qcp qda qpc qpp qqq xaa xac xad xap xcd xcp xcx xda xdc xpa xpc xpd xpp xxp xxx