a-a a-b a-c a-t aaa aab aac aad aae aak aao aap aas aat ab- aba abb abc abd abe abk abo abp abs abt ac- aca acb acc acd ace ack aco acp acs act ad- ada adb adc add ade adk ado adp ads adt aea aeb aec aed aee aek aeo aep aes aet aka akb akc akd ake akk ako akp aks aoa aob aoc aod aoe aok aoo aop aos aot ap- apa apb apc apd ape apk apo app aps apt as- asa asb asc asd ase ask aso asp ass ast at- ata atb atc atd ate ato atp ats att b-p baa bab bac bad bae bak bao bap bas bat bba bbb bbc bbd bbe bbk bbo bbp bbs bbt bca bcb bcc bcd bce bck bco bcp bcs bct bda bdb bdc bdd bde bdk bdo bdp bds bdt be- bea beb bec bed bee bek beo bep bes bet bka bkb bkc bke bkk bko bkp bks bkt boa bob boc bod boe bok boo bop bos bot bpa bpb bpc bpd bpe bpo bpp bps bpt bsa bsb bsc bsd bse bsk bso bsp bss bst bta btb btc btd bte btk bto btp bts btt c-- caa cab cac cad cae cak cao cap cas cat cba cbb cbc cbd cbe cbk cbo cbp cbs cbt cca ccb ccc ccd cce cck cco ccp ccs cct cda cdb cdc cdd cde cdk cdo cdp cds cdt ce- cea ceb cec ced cee cek ceo cep ces cet cka ckb ckc ckd cko cks ckt co- coa cob coc cod coe cok coo cop cos cot cpa cpb cpc cpd cpe cpk cpo cpp cps cpt csa csb csc csd cse csk cso csp css cst cta ctb ctc ctd cte ctk cto ctp cts ctt daa dab dac dad dae dak dao dap das dat dba dbb dbc dbd dbe dbk dbo dbp dbs dbt dca dcb dcc dcd dce dck dco dcp dcs dct dda ddb ddc ddd dde ddk ddo ddp dds ddt de- dea deb dec ded dee dek deo dep des det dka dkb dkc dke dkk dko dkp dks dkt doa dob doc dod doe dok doo dop dos dot dpa dpb dpc dpd dpe dpk dpo dpp dps dpt dsa dsb dsc dsd dse dsk dso dsp dss dst dta dtb dtc dtd dte dtk dto dtp dts dtt eaa eab eac ead eae eak eao eap eas eat eba ebb ebc ebd ebe ebk ebo ebp ebs ebt ec- eca ecb ecc ecd ece eck eco ecs ect ed- eda edb edc edd ede edk edo edp eds edt eea eeb eec eed eee eek eeo eep ees eet eka ekb ekc ekd eke eko ekp eks ekt eo- eoa eob eoc eod eoe eok eoo eop eos eot ep- epa epb epc epd epe epo epp eps ept es- esa esb esc esd ese esk eso esp ess est eta etb etc etd ete etk eto etp ets ett k-t ka- kaa kab kac kad kae kak kao kap kas kat kba kbb kbc kbd kbe kbk kbo kbp kbs kca kcb kcc kcd kce kck kcp kcs kct kda kdb kdc kde kdk kdo kdp kds kdt ke- kea keb kec ked kee kek keo kep kes ket kkb kkc kke kkk kkp kks kkt koa kob koc kod koe kok koo kop kos kot kpa kpc kpd kpe kpk kpo kpp kps kpt ksa ksb ksc ksd kse ksk kso ksp kss kst kta ktb ktc kte ktk kto ktp kts ktt oaa oab oac oad oae oak oao oap oas oat ob- oba obb obc obd obe obk obo obp obs obt oc- oca ocb occ ocd ock oco ocp ocs oct oda odb odc odd ode odo odp ods odt oea oeb oec oed oee oeo oep oes oet oka okb okc okd oke okk oko okp oks oo- ooa oob ooc ood ook ooo oop oos oot op- opa opb opc opd ope opk opo opp ops opt os- osa osb osc osd ose osk oso osp oss ost ot- ota otb otc otd ote otk oto otp ots ott p-p paa pab pac pad pae pak pao pap pas pat pba pbb pbc pbd pbe pbk pbo pbp pbs pbt pca pcb pcc pcd pce pck pco pcp pcs pct pda pdb pdc pdd pde pdk pdo pdp pds pdt pea peb pec ped pee pek peo pep pes pet pka pkb pkc pkd pke pko pkp pks pkt poa pob poc pod poe pok poo pop pos pot ppa ppb ppc ppd ppe ppk ppo ppp pps ppt ps- psa psb psc psd pse psk pso psp pss pst pt- pta ptb ptc ptd pte ptk pto ptp pts ptt saa sab sac sad sae sak sao sap sas sat sba sbb sbc sbd sbe sbk sbo sbp sbs sbt sca scb scc scd sce sck sco scp scs sct sda sdb sdc sdd sde sdk sdo sdp sds sdt se- sea seb sec sed see sek seo sep ses set sk- ska skb skc skd ske skk sko skp sks skt soa sob soc sod soe sok soo sop sos sot spa spb spc spd spe spk spo spp sps spt ss- ssa ssb ssc ssd sse ssk sso ssp sss sst sta stb stc std ste stk sto stp sts stt taa tab tac tad tae tak tao tap tas tat tba tbb tbc tbd tbe tbk tbo tbp tbs tbt tca tcb tcc tcd tce tck tco tcp tcs tct tda tdb tdc tdd tde tdk tdo tdp tds tdt te- tea teb tec ted tee tek teo tep tes tet tka tkb tkc tke tkk tko tkp tks tkt to- toa tob toc tod toe tok too top tos tot tpa tpb tpc tpd tpe tpk tpo tpp tps tpt tsa tsb tsc tsd tse tsk tso tsp