a-a a-b a-c aaa aab aac aae aah aak aap aas ab- aba abb abc abe abh abk abp abs ac- aca acb acc ace ach ack acp acs aea aeb aec aee aeh aek aep aes aha ahb ahc ahe ahh ahk ahp ahs aka akb akc ake akh akk akp aks ap- apa apb apc ape aph apk app aps as- asa asb asc ase ash ask asp ass b-p baa bab bac bae bah bak bap bas bba bbb bbc bbe bbh bbk bbp bbs bca bcb bcc bce bch bck bcp bcs be- bea beb bec bee beh bek bep bes bha bhb bhc bhe bhh bhk bhp bhs bka bkb bkc bke bkk bkp bks bpa bpb bpc bpe bph bpp bps bsa bsb bsc bse bsh bsk bsp bss c-- caa cab cac cae cah cak cap cas cba cbb cbc cbe cbh cbk cbp cbs cca ccb ccc cce cch cck ccp ccs ce- cea ceb cec cee ceh cek cep ces ch- cha chb chc che chh chk chp chs cka ckb ckc ckh cks cpa cpb cpc cpe cph cpk cpp cps csa csb csc cse csh csk csp css eaa eab eac eae eah eak eap eas eba ebb ebc ebe ebh ebk ebp ebs ec- eca ecb ecc ece ech eck ecs eea eeb eec eee eek eep ees eha ehb ehc ehe ehh ehp ehs eka ekb ekc eke ekh ekp eks ep- epa epb epc epe eph epp eps es- esa esb esc ese esh esk esp ess haa hab hac hae hah hak hap has hba hbb hbc hbe hbh hbk hbp hbs hca hcb hcc hce hch hck hcp hcs he- hea heb hec hee heh hek hep hes hha hhb hhc hhe hhh hhk hhp hhs hka hkb hkh hkk hkp hks hpa hpb hpc hpe hph hpk hpp hps hsa hsb hsc hse hsh hsk hsp hss ka- kaa kab kac kae kah kak kap kas kba kbb kbc kbe kbh kbk kbp kbs kca kcb kcc kce kch kck kcp kcs ke- kea keb kec kee keh kek kep kes kha khe khh khk khs kkb kkc kke kkh kkk kkp kks kpa kpc kpe kph kpk kpp kps ksa ksb ksc kse ksh ksk ksp kss p-p paa pab pac pae pah pak pap pas pba pbb pbc pbe pbk pbp pbs pca pcb pcc pce pch pck pcp pcs pea peb pec pee peh pek pep pes pha phb phc phe phk php phs pka pkb pkc pke pkp pks ppa ppb ppc ppe pph ppk ppp pps ps- psa psb psc pse psh psk psp pss saa sab sac sae sah sak sap sas sba sbb sbc sbe sbh sbk sbp sbs sca scb scc sce sch sck scp scs se- sea seb sec see seh sek sep ses sh- sha shb shc she shh shk shp shs sk- ska skb skc ske skh skk skp sks spa spb spc spe sph spk spp sps ss- ssa ssb ssc sse ssh ssk ssp sss