a-a a-b a-t aaa aab aak aan aao aap aas aat ab- aba abb abk abn abo abp abs abt aka akb akk akn ako akp aks an- ana anb ank ann ano anp ans ant aoa aob aok aon aoo aop aos aot ap- apa apb apk apn apo app aps apt as- asa asb ask asn aso asp ass ast at- ata atb atn ato atp ats att b-p baa bab bak ban bao bap bas bat bba bbb bbk bbn bbo bbp bbs bbt bka bkb bkk bkn bko bkp bks bkt bna bnb bnk bnn bno bnp bns bnt boa bob bok bon boo bop bos bot bpa bpb bpn bpo bpp bps bpt bsa bsb bsk bsn bso bsp bss bst bta btb btk btn bto btp bts btt k-t ka- kaa kab kak kan kao kap kas kat kba kbb kbk kbn kbo kbp kbs kkb kkk kkn kkp kks kkt kn- kna knk knn kno knp knt koa kob kok kon koo kop kos kot kpa kpk kpn kpo kpp kps kpt ksa ksb ksk ksn kso ksp kss kst kta ktb ktk ktn kto ktp kts ktt naa nab nak nan nao nap nas nat nba nbb nbk nbn nbo nbp nbs nbt nka nkk nkn nko nkp nks nkt nna nnb nnk nnn nno nnp nns nnt no- noa nob nok non noo nop nos not npa npb npn npo npp nps npt nsa nsb nsk nsn nso nsp nss nst nta ntb ntk ntn nto ntp nts ntt oaa oab oak oan oao oap oas oat ob- oba obb obk obn obo obp obs obt oka okb okk oko okp oks on- ona onb onk onn ono onp ons ont oo- ooa oob ook oon ooo oop oos oot op- opa opb opk opn opo opp ops opt os- osa osb osk osn oso osp oss ost ot- ota otb otk otn oto otp ots ott p-p paa pab pak pan pao pap pas pat pba pbb pbk pbn pbo pbp pbs pbt pka pkb pkn pko pkp pks pkt pn- pna pnb pnk pnn pno pnp pns pnt poa pob pok pon poo pop pos pot ppa ppb ppk ppn ppo ppp pps ppt ps- psa psb psk psn pso psp pss pst pt- pta ptb ptk ptn pto ptp pts ptt saa sab sak san sao sap sas sat sba sbb sbk sbn sbo sbp sbs sbt sk- ska skb skk sko skp sks skt sna snb snk snn sno snp sns snt soa sob sok son soo sop sos sot spa spb spk spn spo spp sps spt ss- ssa ssb ssk ssn sso ssp sss sst sta stb stk stn sto stp sts stt taa tab tak tan tao tap tas tat tba tbb tbk tbn tbo tbp tbs tbt tka tkb tkk tko tkp tks tkt tna tnb tnk tnn tno tnp tns tnt to- toa tob tok ton too top tos tot tpa tpb tpk tpn tpo tpp tps tpt tsa tsb tsk tsn tso tsp tss tst tta ttb ttk ttn tto ttp tts ttt