-er a-a a-b a-i aaa aab aae aaf aah aai aar aas ab- aba abb abe abf abh abi abr abs aea aeb aee aef aeh aei aer aes af- afa afb afe aff afh afi afr afs aha ahb ahe ahf ahh ahi ahr ahs ai- aia aib aie aif aih aii air ais ar- ara arb are arf arh ari arr ars as- asa asb ase asf ash asi asr ass baa bab bae baf bah bai bar bas bba bbb bbe bbf bbh bbi bbr bbs be- bea beb bee bef beh bei ber bes bfa bfb bfe bff bfh bfi bfr bfs bha bhb bhe bhf bhh bhi bhr bhs bi- bia bib bie bif bih bii bir bis bra brb bre brf brh bri brr brs bsa bsb bse bsf bsh bsi bsr bss eaa eab eae eaf eah eai ear eas eba ebb ebe ebf ebh ebi ebr ebs eea eeb eee eef eer ees ef- efa efb efe eff efh efi efr efs eha ehb ehe ehf ehh ehi ehr ehs eia eib eie eif eii eir eis era erb ere erf erh eri err ers es- esa esb ese esf esh esi esr ess faa fab fae faf fah fai far fas fba fbb fbe fbf fbh fbi fbr fbs fea feb fee fef feh fei fer fes ffa ffe fff ffh ffi ffr ffs fha fhb fhe fhf fhh fhi fhr fhs fia fib fie fif fih fii fir fis fra frb fre frf frh fri frr frs fsa fsb fse fsf fsh fsi fsr fss h-i haa hab hae haf hah hai har has hba hbb hbe hbf hbh hbi hbr hbs he- hea heb hee hef heh hei her hes hfa hfb hfe hff hfh hfi hfr hfs hha hhb hhe hhf hhh hhi hhr hhs hia hib hie hif hih hii hir his hr- hra hrb hre hrf hrh hri hrr hrs hsa hsb hse hsf hsh hsi hsr hss i-f ia- iaa iab iae iaf iah iai iar ias iba ibb ibe ibf ibh ibi ibr ibs ie- iea iee ief iei ier ies ifa ifb ife iff ifi ifr ifs iha ihb ihe ihf ihh ihi ihr ihs iia iib iie iif iih iii iir iis ir- ira irb ire irf iri irr irs is- isa isb ise isf ish isi isr iss ra- raa rab rae raf rah rai rar ras rba rbb rbe rbf rbh rbi rbr rbs re- rea reb ree ref reh rei rer res rfa rfb rfe rff rfh rfi rfr rfs rh- rha rhb rhe rhf rhh rhi rhr rhs ria rib rie rif rih rii rir ris rra rrb rrf rrh rri rrr rrs rsa rsb rse rsf rsh rsi rsr rss saa sab sae saf sah sai sar sas sba sbb sbe sbf sbh sbi sbr sbs se- sea seb see sef seh sei ser ses sfa sfb sfe sff sfh sfi sfr sfs sh- sha shb she shf shh shi shr shs sia sib sie sif sih sii sir sis sr- sra srb sre srf srh sri srr srs ss- ssa ssb sse ssf ssh ssi ssr sss