a-a a-b aaa aab aad aae aan aap aas ab- aba abb abd abe abn abp abs ad- ada adb add ade adn adp ads aea aeb aed aee aen aep aes an- ana anb and ane ann anp ans ap- apa apb apd ape apn app aps as- asa asb asd ase asn asp ass b-p baa bab bad bae ban bap bas bba bbb bbd bbe bbn bbp bbs bda bdb bdd bde bdp bds be- bea beb bed bee ben bep bes bna bnb bnd bne bnn bnp bns bpa bpb bpd bpe bpn bpp bps bsa bsb bsd bse bsn bsp bss daa dab dad dae dan dap das dba dbb dbd dbe dbn dbp dbs dda ddb ddd dde ddn ddp dds de- dea deb ded dee den dep des dna dnb dnd dne dnn dnp dns dpa dpb dpd dpe dpn dpp dps dsa dsb dsd dse dsn dsp dss eaa eab ead eae ean eap eas eba ebb ebd ebe ebn ebp ebs ed- eda edb edd ede edn edp eds eea eeb eed eee een eep ees en- ena enb end ene enn enp ens ep- epa epb epd epe epn epp eps es- esa esb esd ese esn esp ess naa nab nad nae nan nap nas nba nbb nbd nbe nbn nbp nbs nda ndb ndd nde ndn ndp nds ne- nea neb ned nee nen nep nes nna nnb nne nnn nnp nns npa npb npd npe npn npp nps nsa nsb nsd nse nsn nsp nss p-p paa pab pad pae pan pap pas pba pbb pbd pbe pbn pbp pbs pda pdb pdd pde pdn pdp pds pea peb ped pee pen pep pes pn- pna pnb pnd pne pnn pnp pns ppa ppb ppd ppe ppn ppp pps ps- psa psb psd pse psn psp pss saa sab sad sae san sap sas sba sbb sbd sbe sbn sbp sbs sda sdb sdd sde sdn sdp sds se- sea seb sed see sen sep ses sna snb snd sne snn snp sns spa spb spd spe spn spp sps ss- ssa ssb ssd sse ssn ssp sss