-ic a-a a-b a-c a-i aaa aab aac aaf aah aai aam aao aas ab- aba abb abc abf abh abi abm abo abs ac- aca acb acc acf ach aci acm aco acs af- afa afb afc aff afh afi afm afo afs aha ahb ahc ahf ahh ahi ahm aho ahs ai- aia aib aic aif aih aii aim aio ais ama amb amc amf amh ami amm amo ams aoa aob aoc aof aoh aoi aom aoo aos as- asa asb asc asf ash asi asm aso ass baa bab bac baf bah bai bam bao bas bba bbb bbc bbf bbh bbi bbm bbo bbs bca bcb bcc bcf bch bci bcm bco bcs bfa bfb bfc bff bfh bfi bfm bfo bfs bha bhb bhc bhf bhh bhi bhm bho bhs bi- bia bib bic bif bih bii bim bio bis bma bmb bmc bmf bmh bmi bmm bmo bms boa bob boc bof boh boi bom boo bos bsa bsb bsc bsf bsh bsi bsm bso bss c-- caa cab cac caf cah cai cam cao cas cba cbb cbc cbf cbh cbi cbm cbo cbs cca ccb ccc ccf cch cci ccm cco ccs cfa cfb cfc cff cfh cfi cfm cfo cfs ch- cha chb chc chf chh chi chm cho chs ci- cia cib cic cif cih cii cim cio cis cma cmb cmc cmf cmh cmi cmm cmo cms co- coa cob coc cof coh coi com coo cos csa csb csc csf csh csi csm cso css faa fab fac faf fah fai fam fao fas fba fbb fbc fbf fbh fbi fbm fbo fbs fca fcb fcc fcf fci fcm fco fcs ffa ffc fff ffh ffi ffm ffo ffs fha fhb fhc fhf fhh fhi fhm fho fhs fia fib fic fif fih fii fim fis fma fmb fmc fmf fmh fmi fmm fmo fms foa fob foc fof foh foi fom foo fos fsa fsb fsc fsf fsh fsi fsm fso fss h-i haa hab hac haf hah hai ham hao has hba hbb hbc hbf hbh hbi hbm hbo hbs hca hcb hcc hcf hch hci hcm hco hcs hfa hfb hfc hff hfh hfi hfm hfo hfs hha hhb hhc hhf hhh hhi hhm hho hhs hia hib hic hif hih hii him hio his hma hmb hmc hmf hmh hmi hmm hmo hms hoa hob hoc hof hoh hoi hom hoo hos hsa hsb hsc hsf hsh hsi hsm hss i-f ia- iaa iab iac iaf iah iai iam iao ias iba ibb ibc ibf ibh ibi ibm ibo ibs ica icb icc icf ich ici icm ico ics ifa ifb ifc iff ifi ifm ifo ifs iha ihb ihc ihf ihh ihi ihm iho ihs iia iib iic iif iih iii iim iio iis im- ima imb imc imf imh imi imm imo ims io- ioa iob ioc iof ioh ioi iom ioo ios is- isa isb isc isf ish isi ism iso iss m-f m-o maa mab mac maf mah mai mam mao mas mba mbb mbc mbf mbh mbi mbm mbo mbs mc- mca mcb mcc mcf mch mci mcm mco mcs mfa mfb mfc mff mfh mfi mfm mfo mfs mha mhc mhf mhh mhi mhm mho mhs mi- mia mib mic mif mih mii mim mio mis mma mmb mmc mmf mmh mmi mmm mmo mms moa mob moc mof moh moi mom moo mos msa msb msc msf msh msi msm mso mss o-i oaa oab oac oaf oah oai oam oao oas ob- oba obb obc obf obh obi obm obo obs oc- oca ocb occ ocf och oci ocm oco ocs of- ofa ofb ofc off ofi ofm ofo ofs oha ohc ohf ohh ohi ohm oho ohs oia oib oic oif oii oim oio ois om- oma omb omc omf omh omi omm omo oms oo- ooa oob ooc oof ooh ooi oom ooo oos os- osa osb osc osf osh osi osm oso oss saa sab sac saf sah sai sam sao sas sba sbb sbc sbf sbh sbi sbm sbo sbs sca scb scc scf sch sci scm sco scs sfa sfb sfc sff sfh sfi sfm sfo sfs sh- sha shb shc shf shh shi shm sho shs sia sib sic sif sih sii sim sio sis sma smb smc smf smh smi smm smo sms soa sob soc sof soh soi som soo sos ss- ssa ssb ssc ssf ssh ssi ssm sso sss