a-a a-b a-c a-t aaa aab aac aae aag aak aap aas aat ab- aba abb abc abe abg abk abp abs abt ac- aca acb acc ace acg ack acp acs act aea aeb aec aee aeg aek aep aes aet ag- aga agb agc age agg agk agp ags agt aka akb akc ake akg akk akp aks ap- apa apb apc ape apg apk app aps apt as- asa asb asc ase asg ask asp ass ast at- ata atb atc ate atg atp ats att b-p baa bab bac bae bag bak bap bas bat bba bbb bbc bbe bbg bbk bbp bbs bbt bca bcb bcc bce bcg bck bcp bcs bct be- bea beb bec bee beg bek bep bes bet bga bgb bgc bge bgg bgk bgp bgs bgt bka bkb bkc bke bkg bkk bkp bks bkt bpa bpb bpc bpe bpg bpp bps bpt bsa bsb bsc bse bsg bsk bsp bss bst bta btb btc bte btg btk btp bts btt c-- caa cab cac cae cag cak cap cas cat cba cbb cbc cbe cbg cbk cbp cbs cbt cca ccb ccc cce ccg cck ccp ccs cct ce- cea ceb cec cee ceg cek cep ces cet cga cgb cgc cge cgg cgp cgs cgt cka ckb ckc cks ckt cpa cpb cpc cpe cpg cpk cpp cps cpt csa csb csc cse csg csk csp css cst cta ctb ctc cte ctg ctk ctp cts ctt eaa eab eac eae eag eak eap eas eat eba ebb ebc ebe ebg ebk ebp ebs ebt ec- eca ecb ecc ece ecg eck ecs ect eea eeb eec eee eeg eek eep ees eet ega egb egc ege egg egp egs egt eka ekb ekc eke ekg ekp eks ekt ep- epa epb epc epe epg epp eps ept es- esa esb esc ese esg esk esp ess est eta etb etc ete etg etk etp ets ett g-p gaa gab gac gae gag gak gap gas gat gba gbc gbe gbg gbk gbp gbs gbt gca gcb gcc gce gcg gck gcp gcs gct ge- gea geb gec gee geg gek gep ges get gga ggb ggc ggg ggp ggs ggt gka gkb gkp gks gkt gpa gpb gpc gpe gpg gpk gpp gps gpt gsa gsb gsc gse gsg gsk gsp gss gst gta gtb gtc gte gtg gtk gtp gts gtt k-t ka- kaa kab kac kae kag kak kap kas kat kba kbb kbc kbe kbk kbp kbs kca kcb kcc kce kcg kck kcp kcs kct ke- kea keb kec kee keg kek kep kes ket kga kgb kgc kgp kgs kkb kkc kke kkk kkp kks kkt kpa kpc kpe kpk kpp kps kpt ksa ksb ksc kse ksg ksk ksp kss kst kta ktb ktc kte ktg ktk ktp kts ktt p-p paa pab pac pae pag pak pap pas pat pba pbb pbc pbe pbg pbk pbp pbs pbt pca pcb pcc pce pcg pck pcp pcs pct pea peb pec pee peg pek pep pes pet pga pgb pgc pge pgg pgk pgp pgs pgt pka pkb pkc pke pkg pkp pks pkt ppa ppb ppc ppe ppg ppk ppp pps ppt ps- psa psb psc pse psg psk psp pss pst pt- pta ptb ptc pte ptg ptk ptp pts ptt saa sab sac sae sag sak sap sas sat sba sbb sbc sbe sbg sbk sbp sbs sbt sca scb scc sce scg sck scp scs sct se- sea seb sec see seg sek sep ses set sga sgb sgc sge sgg sgk sgp sgs sgt sk- ska skb skc ske skg skk skp sks skt spa spb spc spe spg spk spp sps spt ss- ssa ssb ssc sse ssg ssk ssp sss sst sta stb stc ste stg stk stp sts stt taa tab tac tae tag tak tap tas tat tba tbb tbc tbe tbg tbk tbp tbs tbt tca tcb tcc tce tcg tck tcp tcs tct te- tea teb tec tee teg tek tep tes tet tga tgb tgc tge tgg tgk tgp tgs tgt tka tkb tkc tke tkg tkk tkp tks tkt tpa tpb tpc tpe tpg tpk tpp tps tpt tsa tsb tsc tse tsg tsk tsp tss tst tta ttb ttc tte ttg ttk ttp tts ttt