a-a a-c aaa aac aad aae aap aas aax ac- aca acc acd ace acp acs acx ad- ada adc add ade adp ads adx aea aec aed aee aep aes aex ap- apa apc apd ape app aps apx as- asa asc asd ase asp ass asx ax- axa axe axp axs axx c-- caa cac cad cae cap cas cax cca ccc ccd cce ccp ccs ccx cda cdc cdd cde cdp cds cdx ce- cea cec ced cee cep ces cex cpa cpc cpd cpe cpp cps cpx csa csc csd cse csp css csx cxc cxp cxs cxx daa dac dad dae dap das dax dca dcc dcd dce dcp dcs dcx dda ddc ddd dde ddp dds ddx de- dea dec ded dee dep des dex dpa dpc dpd dpe dpp dps dsa dsc dsd dse dsp dss dsx dxc dxd dxp dxs dxx eaa eac ead eae eap eas eax ec- eca ecc ecd ece ecs ecx ed- eda edc edd ede edp eds edx eea eec eed eee eep ees eex ep- epa epc epd epe epp eps epx es- esa esc esd ese esp ess esx ex- exa exc exd exe exp exs exx p-p paa pac pad pae pap pas pax pca pcc pcd pce pcp pcs pcx pda pdc pdd pde pdp pds pdx pea pec ped pee pep pes pex ppa ppc ppd ppe ppp pps ppx ps- psa psc psd pse psp pss psx pxc pxe pxs saa sac sad sae sap sas sax sca scc scd sce scp scs scx sda sdc sdd sde sdp sds se- sea sec sed see sep ses sex spa spc spd spe spp sps spx ss- ssa ssc ssd sse ssp sss ssx sxc sxs xaa xac xad xap xas xcd xcp xcx xda xdc xde xds xed xee xep xes xex xpa xpc xpd xpe xpp xps xsa xsc xsp xss xxp xxx