a-a a-c aaa aac aad aae aak aap aas ac- aca acc acd ace ack acp acs ad- ada adc add ade adk adp ads aea aec aed aee aek aep aes aka akc akd ake akk akp aks ap- apa apc apd ape apk app aps as- asa asc asd ase ask asp ass c-- caa cac cad cae cak cap cas cca ccc ccd cce cck ccp ccs cda cdc cdd cde cdk cdp cds ce- cea cec ced cee cek cep ces cka ckc ckd cks cpa cpc cpd cpe cpk cpp cps csa csc csd cse csk csp css daa dac dad dae dak dap das dca dcc dcd dce dck dcp dcs dda ddc ddd dde ddk ddp dds de- dea dec ded dee dek dep des dka dkc dke dkk dkp dks dpa dpc dpd dpe dpk dpp dps dsa dsc dsd dse dsk dsp dss eaa eac ead eae eak eap eas ec- eca ecc ecd ece eck ecs ed- eda edc edd ede edk edp eds eea eec eed eee eek eep ees eka ekc ekd eke ekp eks ep- epa epc epd epe epp eps es- esa esc esd ese esk esp ess ka- kaa kac kad kae kak kap kas kca kcc kcd kce kck kcp kcs kda kdc kde kdk kdp kds ke- kea kec ked kee kek kep kes kkc kke kkk kkp kks kpa kpc kpd kpe kpk kpp kps ksa ksc ksd kse ksk ksp kss p-p paa pac pad pae pak pap pas pca pcc pcd pce pck pcp pcs pda pdc pdd pde pdk pdp pds pea pec ped pee pek pep pes pka pkc pkd pke pkp pks ppa ppc ppd ppe ppk ppp pps ps- psa psc psd pse psk psp pss saa sac sad sae sak sap sas sca scc scd sce sck scp scs sda sdc sdd sde sdk sdp sds se- sea sec sed see sek sep ses sk- ska skc skd ske skk skp sks spa spc spd spe spk spp sps ss- ssa ssc ssd sse ssk ssp sss