a-a a-b a-t aaa aab aae aak aan aao aap aas aat ab- aba abb abe abk abn abo abp abs abt aea aeb aee aek aen aeo aep aes aet aka akb ake akk akn ako akp aks an- ana anb ane ank ann ano anp ans ant aoa aob aoe aok aon aoo aop aos aot ap- apa apb ape apk apn apo app aps apt as- asa asb ase ask asn aso asp ass ast at- ata atb ate atn ato atp ats att b-p baa bab bae bak ban bao bap bas bat bba bbb bbe bbk bbn bbo bbp bbs bbt be- bea beb bee bek ben beo bep bes bet bka bkb bke bkk bkn bko bkp bks bkt bna bnb bne bnk bnn bno bnp bns bnt boa bob boe bok bon boo bop bos bot bpa bpb bpe bpn bpo bpp bps bpt bsa bsb bse bsk bsn bso bsp bss bst bta btb bte btk btn bto btp bts btt eaa eab eae eak ean eao eap eas eat eba ebb ebe ebk ebn ebo ebp ebs ebt eea eeb eee eek een eeo eep ees eet eka ekb eke eko ekp eks ekt en- ena enb ene enk enn eno enp ens ent eo- eoa eob eoe eok eon eoo eop eos eot ep- epa epb epe epn epo epp eps ept es- esa esb ese esk esn eso esp ess est eta etb ete etk etn eto etp ets ett k-t ka- kaa kab kae kak kan kao kap kas kat kba kbb kbe kbk kbn kbo kbp kbs ke- kea keb kee kek ken keo kep kes ket kkb kke kkk kkn kkp kks kkt kn- kna kne knk knn kno knp knt koa kob koe kok kon koo kop kos kot kpa kpe kpk kpn kpo kpp kps kpt ksa ksb kse ksk ksn kso ksp kss kst kta ktb kte ktk ktn kto ktp kts ktt naa nab nae nak nan nao nap nas nat nba nbb nbe nbk nbn nbo nbp nbs nbt ne- nea neb nee nek nen neo nep nes net nka nke nkk nkn nko nkp nks nkt nna nnb nne nnk nnn nno nnp nns nnt no- noa nob noe nok non noo nop nos not npa npb npe npn npo npp nps npt nsa nsb nse nsk nsn nso nsp nss nst nta ntb nte ntk ntn nto ntp nts ntt oaa oab oae oak oan oao oap oas oat ob- oba obb obe obk obn obo obp obs obt oea oeb oee oen oeo oep oes oet oka okb oke okk oko okp oks on- ona onb one onk onn ono onp ons ont oo- ooa oob ook oon ooo oop oos oot op- opa opb ope opk opn opo opp ops opt os- osa osb ose osk osn oso osp oss ost ot- ota otb ote otk otn oto otp ots ott p-p paa pab pae pak pan pao pap pas pat pba pbb pbe pbk pbn pbo pbp pbs pbt pea peb pee pek pen peo pep pes pet pka pkb pke pkn pko pkp pks pkt pn- pna pnb pne pnk pnn pno pnp pns pnt poa pob poe pok pon poo pop pos pot ppa ppb ppe ppk ppn ppo ppp pps ppt ps- psa psb pse psk psn pso psp pss pst pt- pta ptb pte ptk ptn pto ptp pts ptt saa sab sae sak san sao sap sas sat sba sbb sbe sbk sbn sbo sbp sbs sbt se- sea seb see sek sen seo sep ses set sk- ska skb ske skk sko skp sks skt sna snb sne snk snn sno snp sns snt soa sob soe sok son soo sop sos sot spa spb spe spk spn spo spp sps spt ss- ssa ssb sse ssk ssn sso ssp sss sst sta stb ste stk stn sto stp sts stt taa tab tae tak tan tao tap tas tat tba tbb tbe tbk tbn tbo tbp tbs tbt te- tea teb tee tek ten teo tep tes tet tka tkb tke tkk tko tkp tks tkt tna tnb tne tnk tnn tno tnp tns tnt to- toa tob toe tok ton too top tos tot tpa tpb tpe tpk tpn tpo tpp tps tpt tsa tsb tse tsk tsn tso tsp tss tst tta ttb tte ttk ttn tto ttp tts ttt