a-a a-b a-i a-t aaa aab aae aai aak aap aas aat ab- aba abb abe abi abk abp abs abt aea aeb aee aei aek aep aes aet ai- aia aib aie aii aik aip ais ait aka akb ake aki akk akp aks ap- apa apb ape api apk app aps apt as- asa asb ase asi ask asp ass ast at- ata atb ate ati atp ats att b-p baa bab bae bai bak bap bas bat bba bbb bbe bbi bbk bbp bbs bbt be- bea beb bee bei bek bep bes bet bi- bia bib bie bii bik bip bis bit bka bkb bke bkk bkp bks bkt bpa bpb bpe bpi bpp bps bpt bsa bsb bse bsi bsk bsp bss bst bta btb bte bti btk btp bts btt eaa eab eae eai eak eap eas eat eba ebb ebe ebi ebk ebp ebs ebt eea eeb eee eek eep ees eet eia eib eie eii eik eip eis eit eka ekb eke eki ekp eks ekt ep- epa epb epe epi epp eps ept es- esa esb ese esi esk esp ess est eta etb ete eti etk etp ets ett ia- iaa iab iae iai iap ias iat iba ibb ibe ibi ibk ibp ibs ibt ie- iea iee iei iek iep ies iet iia iib iie iii iip iis iit ika ikb ike iki ikk iks ikt ipa ipb ipe ipi ipp ips ipt is- isa isb ise isi isk isp iss ist ita itb ite iti itk itp its itt k-t ka- kaa kab kae kai kak kap kas kat kba kbb kbe kbi kbk kbp kbs ke- kea keb kee kei kek kep kes ket kia kib kie kii kik kip kis kit kkb kke kki kkk kkp kks kkt kpa kpe kpi kpk kpp kps kpt ksa ksb kse ksi ksk ksp kss kst kta ktb kte ktk ktp kts ktt p-p paa pab pae pai pak pap pas pat pba pbb pbe pbi pbk pbp pbs pbt pea peb pee pei pek pep pes pet pia pib pie pii pik pip pis pit pka pkb pke pki pkp pks pkt ppa ppb ppe ppi ppk ppp pps ppt ps- psa psb pse psi psk psp pss pst pt- pta ptb pte pti ptk ptp pts ptt saa sab sae sai sak sap sas sat sba sbb sbe sbi sbk sbp sbs sbt se- sea seb see sei sek sep ses set sia sib sie sii sik sip sis sit sk- ska skb ske ski skk skp sks skt spa spb spe spi spk spp sps spt ss- ssa ssb sse ssi ssk ssp sss sst sta stb ste sti stk stp sts stt taa tab tae tai tak tap tas tat tba tbb tbe tbi tbk tbp tbs tbt te- tea teb tee tei tek tep tes tet tia tib tie tii tik tip tis tit tka tkb tke tkk tkp tks tkt tpa tpb tpe tpi tpk tpp tps tpt tsa tsb tse tsi tsk tsp tss tst tta ttb tte tti ttk ttp tts ttt