a-a a-b a-t aaa aab aae aak aap aas aat ab- aba abb abe abk abp abs abt aea aeb aee aek aep aes aet aka akb ake akk akp aks ap- apa apb ape apk app aps apt as- asa asb ase ask asp ass ast at- ata atb ate atp ats att b-p baa bab bae bak bap bas bat bba bbb bbe bbk bbp bbs bbt be- bea beb bee bek bep bes bet bka bkb bke bkk bkp bks bkt bpa bpb bpe bpp bps bpt bsa bsb bse bsk bsp bss bst bta btb bte btk btp bts btt eaa eab eae eak eap eas eat eba ebb ebe ebk ebp ebs ebt eea eeb eee eek eep ees eet eka ekb eke ekp eks ekt ep- epa epb epe epp eps ept es- esa esb ese esk esp ess est eta etb ete etk etp ets ett k-t ka- kaa kab kae kak kap kas kat kba kbb kbe kbk kbp kbs ke- kea keb kee kek kep kes ket kkb kke kkk kkp kks kkt kpa kpe kpk kpp kps kpt ksa ksb kse ksk ksp kss kst kta ktb kte ktk ktp kts ktt p-p paa pab pae pak pap pas pat pba pbb pbe pbk pbp pbs pbt pea peb pee pek pep pes pet pka pkb pke pkp pks pkt ppa ppb ppe ppk ppp pps ppt ps- psa psb pse psk psp pss pst pt- pta ptb pte ptk ptp pts ptt saa sab sae sak sap sas sat sba sbb sbe sbk sbp sbs sbt se- sea seb see sek sep ses set sk- ska skb ske skk skp sks skt spa spb spe spk spp sps spt ss- ssa ssb sse ssk ssp sss sst sta stb ste stk stp sts stt taa tab tae tak tap tas tat tba tbb tbe tbk tbp tbs tbt te- tea teb tee tek tep tes tet tka tkb tke tkk tkp tks tkt tpa tpb tpe tpk tpp tps tpt tsa tsb tse tsk tsp tss tst tta ttb tte ttk ttp tts ttt