a-a a-b a-i a-t aaa aab aai aak aan aap aas aat ab- aba abb abi abk abn abp abs abt ai- aia aib aii aik ain aip ais ait aka akb aki akk akn akp aks an- ana anb ani ank ann anp ans ant ap- apa apb api apk apn app aps apt as- asa asb asi ask asn asp ass ast at- ata atb ati atn atp ats att b-p baa bab bai bak ban bap bas bat bba bbb bbi bbk bbn bbp bbs bbt bi- bia bib bii bik bin bip bis bit bka bkb bkk bkn bkp bks bkt bna bnb bni bnk bnn bnp bns bnt bpa bpb bpi bpn bpp bps bpt bsa bsb bsi bsk bsn bsp bss bst bta btb bti btk btn btp bts btt ia- iaa iab iai ian iap ias iat iba ibb ibi ibk ibn ibp ibs ibt iia iib iii iin iip iis iit ika ikb iki ikk iks ikt in- ina inb ini ink inn inp ins int ipa ipb ipi ipn ipp ips ipt is- isa isb isi isk isn isp iss ist ita itb iti itk itn itp its itt k-t ka- kaa kab kai kak kan kap kas kat kba kbb kbi kbk kbn kbp kbs kia kib kii kik kin kip kis kit kkb kki kkk kkn kkp kks kkt kn- kna kni knk knn knp knt kpa kpi kpk kpn kpp kps kpt ksa ksb ksi ksk ksn ksp kss kst kta ktb ktk ktn ktp kts ktt n-i naa nab nai nak nan nap nas nat nba nbb nbi nbk nbn nbp nbs nbt nia nib nii nik nin nip nis nit nka nki nkk nkn nkp nks nkt nna nnb nni nnk nnn nnp nns nnt npa npb npi npn npp nps npt nsa nsb nsi nsk nsn nsp nss nst nta ntb nti ntk ntn ntp nts ntt p-p paa pab pai pak pan pap pas pat pba pbb pbi pbk pbn pbp pbs pbt pia pib pii pik pin pip pis pit pka pkb pki pkn pkp pks pkt pn- pna pnb pni pnk pnn pnp pns pnt ppa ppb ppi ppk ppn ppp pps ppt ps- psa psb psi psk psn psp pss pst pt- pta ptb pti ptk ptn ptp pts ptt saa sab sai sak san sap sas sat sba sbb sbi sbk sbn sbp sbs sbt sia sib sii sik sin sip sis sit sk- ska skb ski skk skp sks skt sna snb sni snk snn snp sns snt spa spb spi spk spn spp sps spt ss- ssa ssb ssi ssk ssn ssp sss sst sta stb sti stk stn stp sts stt taa tab tai tak tan tap tas tat tba tbb tbi tbk tbn tbp tbs tbt tia tib tii tik tin tip tis tit tka tkb tkk tkp tks tkt tna tnb tni tnk tnn tnp tns tnt tpa tpb tpi tpk tpn tpp tps tpt tsa tsb tsi tsk tsn tsp tss tst tta ttb tti ttk ttn ttp tts ttt