a-a a-b a-i a-t aaa aab aae aaf aai aap aas aat ab- aba abb abe abf abi abp abs abt aea aeb aee aef aei aep aes aet af- afa afb afe aff afi afp afs aft ai- aia aib aie aif aii aip ais ait ap- apa apb ape apf api app aps apt as- asa asb ase asf asi asp ass ast at- ata atb ate atf ati atp ats att b-p baa bab bae baf bai bap bas bat bba bbb bbe bbf bbi bbp bbs bbt be- bea beb bee bef bei bep bes bet bfa bfb bfe bff bfi bfp bfs bft bi- bia bib bie bif bii bip bis bit bpa bpb bpe bpf bpi bpp bps bpt bsa bsb bse bsf bsi bsp bss bst bta btb bte btf bti btp bts btt eaa eab eae eaf eai eap eas eat eba ebb ebe ebf ebi ebp ebs ebt eea eeb eee eef eep ees eet ef- efa efb efe eff efi efp efs eft eia eib eie eif eii eip eis eit ep- epa epb epe epf epi epp eps ept es- esa esb ese esf esi esp ess est eta etb ete etf eti etp ets ett faa fab fae faf fai fap fas fat fba fbb fbe fbf fbi fbp fbs fbt fea feb fee fef fei fep fes fet ffa ffe fff ffi ffp ffs fft fia fib fie fif fii fip fis fit fpa fpb fpe fpi fpp fps fpt fsa fsb fse fsf fsi fsp fss fst fta ftb fte ftf fti ftp fts ftt i-f ia- iaa iab iae iaf iai iap ias iat iba ibb ibe ibf ibi ibp ibs ibt ie- iea iee ief iei iep ies iet ifa ifb ife iff ifi ifp ifs ift iia iib iie iif iii iip iis iit ipa ipb ipe ipf ipi ipp ips ipt is- isa isb ise isf isi isp iss ist ita itb ite itf iti itp its itt p-p paa pab pae paf pai pap pas pat pba pbb pbe pbf pbi pbp pbs pbt pea peb pee pef pei pep pes pet pfa pfb pfe pff pfi pfp pfs pft pia pib pie pif pii pip pis pit ppa ppb ppe ppf ppi ppp pps ppt ps- psa psb pse psf psi psp pss pst pt- pta ptb pte ptf pti ptp pts ptt saa sab sae saf sai sap sas sat sba sbb sbe sbf sbi sbp sbs sbt se- sea seb see sef sei sep ses set sfa sfb sfe sff sfi sfp sfs sft sia sib sie sif sii sip sis sit spa spb spe spf spi spp sps spt ss- ssa ssb sse ssf ssi ssp sss sst sta stb ste stf sti stp sts stt taa tab tae taf tai tap tas tat tba tbb tbe tbf tbi tbp tbs tbt te- tea teb tee tef tei tep tes tet tfa tfb tfe tff tfi tfp tfs tft tia tib tie tif tii tip tis tit tpa tpb tpe tpf tpi tpp tps tpt tsa tsb tse tsf tsi tsp tss tst tta ttb tte ttf tti ttp tts ttt