a-a a-c aaa aac aad aae aak aan aap ac- aca acc acd ace ack acn acp ad- ada adc add ade adk adn adp aea aec aed aee aek aen aep aka akc akd ake akk akn akp an- ana anc and ane ank ann anp ap- apa apc apd ape apk apn app c-- caa cac cad cae cak can cap cca ccc ccd cce cck ccn ccp cda cdc cdd cde cdk cdn cdp ce- cea cec ced cee cek cen cep cka ckc ckd cn- cna cnc cnd cne cnn cnp cpa cpc cpd cpe cpk cpn cpp daa dac dad dae dak dan dap dca dcc dcd dce dck dcn dcp dda ddc ddd dde ddk ddn ddp de- dea dec ded dee dek den dep dka dkc dke dkk dkp dna dnc dnd dne dnk dnn dnp dpa dpc dpd dpe dpk dpn dpp eaa eac ead eae eak ean eap ec- eca ecc ecd ece eck ecn ed- eda edc edd ede edk edn edp eea eec eed eee eek een eep eka ekc ekd eke ekp en- ena enc end ene enk enn enp ep- epa epc epd epe epn epp ka- kaa kac kad kae kak kan kap kca kcc kcd kce kck kcn kcp kda kdc kde kdk kdp ke- kea kec ked kee kek ken kep kkc kke kkk kkn kkp kn- kna knc knd kne knk knn knp kpa kpc kpd kpe kpk kpn kpp naa nac nad nae nak nan nap nca ncc ncd nce nck ncn ncp nda ndc ndd nde ndk ndn ndp ne- nea nec ned nee nek nen nep nka nkc nke nkk nkn nkp nna nnc nne nnk nnn nnp npa npc npd npe npn npp p-p paa pac pad pae pak pan pap pca pcc pcd pce pck pcn pcp pda pdc pdd pde pdk pdn pdp pea pec ped pee pek pen pep pka pkc pkd pke pkn pkp pn- pna pnc pnd pne pnk pnn pnp ppa ppc ppd ppe ppk ppn ppp