-ic a-a a-b a-c a-i a-t aaa aab aac aae aai aam aao aas aat ab- aba abb abc abe abi abm abo abs abt ac- aca acb acc ace aci acm aco acs act aea aeb aec aee aei aem aeo aes aet ai- aia aib aic aie aii aim aio ais ait ama amb amc ame ami amm amo ams amt aoa aob aoc aoe aoi aom aoo aos aot as- asa asb asc ase asi asm aso ass ast at- ata atb atc ate ati atm ato ats att baa bab bac bae bai bam bao bas bat bba bbb bbc bbe bbi bbm bbo bbs bbt bca bcb bcc bce bci bcm bco bcs bct be- bea beb bec bee bei bem beo bes bet bi- bia bib bic bie bii bim bio bis bit bma bmb bmc bme bmi bmm bmo bms bmt boa bob boc boe boi bom boo bos bot bsa bsb bsc bse bsi bsm bso bss bst bta btb btc bte bti btm bto bts btt c-- caa cab cac cae cai cam cao cas cat cba cbb cbc cbe cbi cbm cbo cbs cbt cca ccb ccc cce cci ccm cco ccs cct ce- cea ceb cec cee cei cem ceo ces cet ci- cia cib cic cie cii cim cio cis cit cma cmb cmc cme cmi cmm cmo cms cmt co- coa cob coc coe coi com coo cos cot csa csb csc cse csi csm cso css cst cta ctb ctc cte cti ctm cto cts ctt eaa eab eac eae eai eam eao eas eat eba ebb ebc ebe ebi ebm ebo ebs ebt ec- eca ecb ecc ece eci ecm eco ecs ect eea eeb eec eee eem eeo ees eet eia eib eic eie eii eim eio eis eit em- ema emb emc eme emi emm emo ems emt eo- eoa eob eoc eoe eoi eom eoo eos eot es- esa esb esc ese esi esm eso ess est eta etb etc ete eti etm eto ets ett ia- iaa iab iac iae iai iam iao ias iat iba ibb ibc ibe ibi ibm ibo ibs ibt ica icb icc ice ici icm ico ics ict ie- iea iec iee iei iem ies iet iia iib iic iie iii iim iio iis iit im- ima imb imc ime imi imm imo ims imt io- ioa iob ioc ioe ioi iom ioo ios iot is- isa isb isc ise isi ism iso iss ist ita itb itc ite iti itm ito its itt m-o maa mab mac mae mai mam mao mas mat mba mbb mbc mbe mbi mbm mbo mbs mbt mc- mca mcb mcc mce mci mcm mco mcs mct mea meb mec mee mei mem meo mes met mi- mia mib mic mie mii mim mio mis mit mma mmb mmc mme mmi mmm mmo mms mmt moa mob moc moe moi mom moo mos mot msa msb msc mse msi msm mso mss mst mta mtb mtc mte mti mtm mto mts mtt o-i oaa oab oac oae oai oam oao oas oat ob- oba obb obc obe obi obm obo obs obt oc- oca ocb occ oci ocm oco ocs oct oea oeb oec oee oei oem oeo oes oet oia oib oic oie oii oim oio ois oit om- oma omb omc ome omi omm omo oms omt oo- ooa oob ooc ooi oom ooo oos oot os- osa osb osc ose osi osm oso oss ost ot- ota otb otc ote oti otm oto ots ott saa sab sac sae sai sam sao sas sat sba sbb sbc sbe sbi sbm sbo sbs sbt sca scb scc sce sci scm sco scs sct se- sea seb sec see sei sem seo ses set sia sib sic sie sii sim sio sis sit sma smb smc sme smi smm smo sms smt soa sob soc soe soi som soo sos sot ss- ssa ssb ssc sse ssi ssm sso sss sst sta stb stc ste sti stm sto sts stt taa tab tac tae tai tam tao tas tat tba tbb tbc tbe tbi tbm tbo tbs tbt tca tcb tcc tce tci tcm tco tcs tct te- tea teb tec tee tei tem teo tes tet tia tib tic tie tii tim tio tis tit tma tmb tmc tme tmi tmm tmo tms tmt to- toa tob toc toe toi tom too tos tot tsa tsb tsc tse tsi tsm tso tss tst tta ttb ttc tte tti ttm tto tts ttt