-er -ic a-a a-b a-c a-i aaa aab aac aae aaf aah aai aao aar aas ab- aba abb abc abe abf abh abi abo abr abs ac- aca acb acc ace acf ach aci aco acr acs aea aeb aec aee aef aeh aei aeo aer aes af- afa afb afc afe aff afh afi afo afr afs aha ahb ahc ahe ahf ahh ahi aho ahr ahs ai- aia aib aic aie aif aih aii aio air ais aoa aob aoc aoe aof aoh aoi aoo aor aos ar- ara arb arc are arf arh ari aro arr ars as- asa asb asc ase asf ash asi aso asr ass baa bab bac bae baf bah bai bao bar bas bba bbb bbc bbe bbf bbh bbi bbo bbr bbs bca bcb bcc bce bcf bch bci bco bcr bcs be- bea beb bec bee bef beh bei beo ber bes bfa bfb bfc bfe bff bfh bfi bfo bfr bfs bha bhb bhc bhe bhf bhh bhi bho bhr bhs bi- bia bib bic bie bif bih bii bio bir bis boa bob boc boe bof boh boi boo bor bos bra brb bre brf brh bri bro brr brs bsa bsb bsc bse bsf bsh bsi bso bsr bss c-- caa cab cac cae caf cah cai cao car cas cba cbb cbc cbe cbf cbh cbi cbo cbr cbs cca ccb ccc cce ccf cch cci cco ccr ccs ce- cea ceb cec cee cef ceh cei ceo cer ces cfa cfb cfc cfe cff cfh cfi cfo cfr cfs ch- cha chb chc che chf chh chi cho chr chs ci- cia cib cic cie cif cih cii cio cir cis co- coa cob coc coe cof coh coi coo cor cos cra crb crc cre crf crh cri cro crr crs csa csb csc cse csf csh csi cso csr css eaa eab eac eae eaf eah eai eao ear eas eba ebb ebc ebe ebf ebh ebi ebo ebr ebs ec- eca ecb ecc ece ecf ech eci eco ecr ecs eea eeb eec eee eef eeo eer ees ef- efa efb efc efe eff efh efi efo efr efs eha ehb ehc ehe ehf ehh ehi eho ehr ehs eia eib eic eie eif eii eio eir eis eo- eoa eob eoc eoe eof eoh eoi eoo eor eos era erb erc ere erf erh eri ero err ers es- esa esb esc ese esf esh esi eso esr ess faa fab fac fae faf fah fai fao far fas fba fbb fbc fbe fbf fbh fbi fbo fbr fbs fca fcb fcc fce fcf fci fco fcr fcs fea feb fec fee fef feh fei feo fer fes ffa ffc ffe fff ffh ffi ffo ffr ffs fha fhb fhc fhe fhf fhh fhi fho fhr fhs fia fib fic fie fif fih fii fir fis foa fob foc foe fof foh foi foo for fos fra frb frc fre frf frh fri fro frr frs fsa fsb fsc fse fsf fsh fsi fso fsr fss h-i haa hab hac hae haf hah hai hao har has hba hbb hbc hbe hbf hbh hbi hbo hbr hbs hca hcb hcc hce hcf hch hci hco hcr hcs he- hea heb hec hee hef heh hei heo her hes hfa hfb hfc hfe hff hfh hfi hfo hfr hfs hha hhb hhc hhe hhf hhh hhi hho hhr hhs hia hib hic hie hif hih hii hio hir his hoa hob hoc hoe hof hoh hoi hoo hor hos hr- hra hrb hrc hre hrf hrh hri hro hrr hrs hsa hsb hsc hse hsf hsh hsi hsr hss i-f ia- iaa iab iac iae iaf iah iai iao iar ias iba ibb ibc ibe ibf ibh ibi ibo ibr ibs ica icb icc ice icf ich ici ico icr ics ie- iea iec iee ief iei ier ies ifa ifb ifc ife iff ifi ifo ifr ifs iha ihb ihc ihe ihf ihh ihi iho ihr ihs iia iib iic iie iif iih iii iio iir iis io- ioa iob ioc ioe iof ioh ioi ioo ior ios ir- ira irb irc ire irf iri iro irr irs is- isa isb isc ise isf ish isi iso isr iss o-i oaa oab oac oae oaf oah oai oao oar oas ob- oba obb obc obe obf obh obi obo obr obs oc- oca ocb occ ocf och oci oco ocr ocs oea oeb oec oee oef oeh oei oeo oer oes of- ofa ofb ofc ofe off ofi ofo ofr ofs oha ohc ohe ohf ohh ohi oho ohr ohs oia oib oic oie oif oii oio oir ois oo- ooa oob ooc oof ooh ooi ooo oor oos or- ora orb orc ore orf orh ori oro orr ors os- osa osb osc ose osf osh osi oso osr oss ra- raa rab rac rae raf rah rai rao rar ras rba rbb rbc rbe rbf rbh rbi rbo rbr rbs rca rcb rcc rce rcf rch rci rco rcr rcs re- rea reb rec ree ref reh rei reo rer res rfa rfb rfc rfe rff rfh rfi rfo rfr rfs rh- rha rhb rhc rhe rhf rhh rhi rho rhr rhs ria rib ric rie rif rih rii rio rir ris roa rob roc roe rof roh roi roo ror ros rra rrb rrc rrf rrh rri rrr rrs rsa rsb rsc rse rsf rsh rsi rso rsr rss saa sab sac sae saf sah sai sao sar sas sba sbb sbc sbe sbf sbh sbi sbo sbr sbs sca scb scc sce scf sch sci sco scr scs se- sea seb sec see sef seh sei seo ser ses sfa sfb sfc sfe sff sfh sfi sfo sfr sfs sh- sha shb shc she shf shh shi sho shr shs sia sib sic sie sif sih sii sio sir sis soa sob soc soe sof soh