-th a-a a-b a-c a-t aaa aab aac aah aak aao aap aas aat ab- aba abb abc abh abk abo abp abs abt ac- aca acb acc ach ack aco acp acs act aha ahb ahc ahh ahk aho ahp ahs aht aka akb akc akh akk ako akp aks aoa aob aoc aoh aok aoo aop aos aot ap- apa apb apc aph apk apo app aps apt as- asa asb asc ash ask aso asp ass ast at- ata atb atc ath ato atp ats att b-p baa bab bac bah bak bao bap bas bat bba bbb bbc bbh bbk bbo bbp bbs bbt bca bcb bcc bch bck bco bcp bcs bct bha bhb bhc bhh bhk bho bhp bhs bht bka bkb bkc bkk bko bkp bks bkt boa bob boc boh bok boo bop bos bot bpa bpb bpc bph bpo bpp bps bpt bsa bsb bsc bsh bsk bso bsp bss bst bta btb btc bth btk bto btp bts btt c-- caa cab cac cah cak cao cap cas cat cba cbb cbc cbh cbk cbo cbp cbs cbt cca ccb ccc cch cck cco ccp ccs cct ch- cha chb chc chh chk cho chp chs cht cka ckb ckc ckh cko cks ckt co- coa cob coc coh cok coo cop cos cot cpa cpb cpc cph cpk cpo cpp cps cpt csa csb csc csh csk cso csp css cst cta ctb ctc cth ctk cto ctp cts ctt haa hab hac hah hak hao hap has hat hba hbb hbc hbh hbk hbo hbp hbs hbt hca hcb hcc hch hck hco hcp hcs hct hha hhb hhc hhh hhk hho hhp hhs hht hka hkb hkh hkk hko hkp hks hkt hoa hob hoc hoh hok hoo hop hos hot hpa hpb hpc hph hpk hpo hpp hps hpt hsa hsb hsc hsh hsk hsp hss hst hta htb htc hth htk hto htp hts htt k-t ka- kaa kab kac kah kak kao kap kas kat kba kbb kbc kbh kbk kbo kbp kbs kca kcb kcc kch kck kcp kcs kct kha khh khk kho khs kkb kkc kkh kkk kkp kks kkt koa kob koc koh kok koo kop kos kot kpa kpc kph kpk kpo kpp kps kpt ksa ksb ksc ksh ksk kso ksp kss kst kta ktb ktc kth ktk kto ktp kts ktt oaa oab oac oah oak oao oap oas oat ob- oba obb obc obh obk obo obp obs obt oc- oca ocb occ och ock oco ocp ocs oct oha ohc ohh oho ohp ohs oht oka okb okc okk oko okp oks oo- ooa oob ooc ooh ook ooo oop oos oot op- opa opb opc oph opk opo opp ops opt os- osa osb osc osh osk oso osp oss ost ot- ota otb otc oth otk oto otp ots ott p-p paa pab pac pah pak pao pap pas pat pba pbb pbc pbk pbo pbp pbs pbt pca pcb pcc pch pck pco pcp pcs pct pha phb phc phk pho php phs pht pka pkb pkc pko pkp pks pkt poa pob poc poh pok poo pop pos pot ppa ppb ppc pph ppk ppo ppp pps ppt ps- psa psb psc psh psk pso psp pss pst pt- pta ptb ptc pth ptk pto ptp pts ptt saa sab sac sah sak sao sap sas sat sba sbb sbc sbh sbk sbo sbp sbs sbt sca scb scc sch sck sco scp scs sct sh- sha shb shc shh shk sho shp shs sht sk- ska skb skc skh skk sko skp sks skt soa sob soc soh sok soo sop sos sot spa spb spc sph spk spo spp sps spt ss- ssa ssb ssc ssh ssk sso ssp sss sst sta stb stc sth stk sto stp sts stt taa tab tac tah tak tao tap tas tat tba tbb tbc tbh tbk tbo tbp tbs tbt tca tcb tcc tch tck tco tcp tcs tct th- tha thb thc thh thk tho thp ths tht tka tkb tkc tkk tko tkp tks tkt to- toa tob toc toh tok too top tos tot tpa tpb tpc tph tpk tpo tpp tps tpt tsa tsb tsc tsh tsk tso tsp tss tst tta ttb ttc tth ttk tto ttp tts ttt