a-a a-b a-i a-t aaa aab aae aaf aai aak aap aas aat ab- aba abb abe abf abi abk abp abs abt aea aeb aee aef aei aek aep aes aet af- afa afb afe aff afi afk afp afs aft ai- aia aib aie aif aii aik aip ais ait aka akb ake aki akk akp aks ap- apa apb ape apf api apk app aps apt as- asa asb ase asf asi ask asp ass ast at- ata atb ate atf ati atp ats att b-p baa bab bae baf bai bak bap bas bat bba bbb bbe bbf bbi bbk bbp bbs bbt be- bea beb bee bef bei bek bep bes bet bfa bfb bfe bff bfi bfp bfs bft bi- bia bib bie bif bii bik bip bis bit bka bkb bke bkf bkk bkp bks bkt bpa bpb bpe bpf bpi bpp bps bpt bsa bsb bse bsf bsi bsk bsp bss bst bta btb bte btf bti btk btp bts btt eaa eab eae eaf eai eak eap eas eat eba ebb ebe ebf ebi ebk ebp ebs ebt eea eeb eee eef eek eep ees eet ef- efa efb efe eff efi efp efs eft eia eib eie eif eii eik eip eis eit eka ekb eke ekf eki ekp eks ekt ep- epa epb epe epf epi epp eps ept es- esa esb ese esf esi esk esp ess est eta etb ete etf eti etk etp ets ett faa fab fae faf fai fak fap fas fat fba fbb fbe fbf fbi fbk fbp fbs fbt fea feb fee fef fei fek fep fes fet ffa ffe fff ffi ffk ffp ffs fft fia fib fie fif fii fik fip fis fit fka fkb fkf fki fkk fkp fkt fpa fpb fpe fpi fpk fpp fps fpt fsa fsb fse fsf fsi fsk fsp fss fst fta ftb fte ftf fti ftk ftp fts ftt i-f ia- iaa iab iae iaf iai iap ias iat iba ibb ibe ibf ibi ibk ibp ibs ibt ie- iea iee ief iei iek iep ies iet ifa ifb ife iff ifi ifp ifs ift iia iib iie iif iii iip iis iit ika ikb ike ikf iki ikk iks ikt ipa ipb ipe ipf ipi ipp ips ipt is- isa isb ise isf isi isk isp iss ist ita itb ite itf iti itk itp its itt k-t ka- kaa kab kae kaf kai kak kap kas kat kba kbb kbe kbf kbi kbk kbp kbs ke- kea keb kee kef kei kek kep kes ket kfa kff kfi kfs kia kib kie kif kii kik kip kis kit kkb kke kki kkk kkp kks kkt kpa kpe kpf kpi kpk kpp kps kpt ksa ksb kse ksf ksi ksk ksp kss kst kta ktb kte ktf ktk ktp kts ktt p-p paa pab pae paf pai pak pap pas pat pba pbb pbe pbf pbi pbk pbp pbs pbt pea peb pee pef pei pek pep pes pet pfa pfb pfe pff pfi pfk pfp pfs pft pia pib pie pif pii pik pip pis pit pka pkb pke pkf pki pkp pks pkt ppa ppb ppe ppf ppi ppk ppp pps ppt ps- psa psb pse psf psi psk psp pss pst pt- pta ptb pte ptf pti ptk ptp pts ptt saa sab sae saf sai sak sap sas sat sba sbb sbe sbf sbi sbk sbp sbs sbt se- sea seb see sef sei sek sep ses set sfa sfb sfe sff sfi sfk sfp sfs sft sia sib sie sif sii sik sip sis sit sk- ska skb ske skf ski skk skp sks skt spa spb spe spf spi spk spp sps spt ss- ssa ssb sse ssf ssi ssk ssp sss sst sta stb ste stf sti stk stp sts stt taa tab tae taf tai tak tap tas tat tba tbb tbe tbf tbi tbk tbp tbs tbt te- tea teb tee tef tei tek tep tes tet tfa tfb tfe tff tfi tfk tfp tfs tft tia tib tie tif tii tik tip tis tit tka tkb tke tkk tkp tks tkt tpa tpb tpe tpf tpi tpk tpp tps tpt tsa tsb tse tsf tsi tsk tsp tss tst tta ttb tte ttf tti ttk ttp tts ttt