-er -ic a-a a-b a-c a-i aaa aab aac aae aai aam aao aar aas ab- aba abb abc abe abi abm abo abr abs ac- aca acb acc ace aci acm aco acr acs aea aeb aec aee aei aem aeo aer aes ai- aia aib aic aie aii aim aio air ais ama amb amc ame ami amm amo amr ams aoa aob aoc aoe aoi aom aoo aor aos ar- ara arb arc are ari arm aro arr ars as- asa asb asc ase asi asm aso asr ass baa bab bac bae bai bam bao bar bas bba bbb bbc bbe bbi bbm bbo bbr bbs bca bcb bcc bce bci bcm bco bcr bcs be- bea beb bec bee bei bem beo ber bes bi- bia bib bic bie bii bim bio bir bis bma bmb bmc bme bmi bmm bmo bmr bms boa bob boc boe boi bom boo bor bos bra brb bre bri brm bro brr brs bsa bsb bsc bse bsi bsm bso bsr bss c-- caa cab cac cae cai cam cao car cas cba cbb cbc cbe cbi cbm cbo cbr cbs cca ccb ccc cce cci ccm cco ccr ccs ce- cea ceb cec cee cei cem ceo cer ces ci- cia cib cic cie cii cim cio cir cis cma cmb cmc cme cmi cmm cmo cmr cms co- coa cob coc coe coi com coo cor cos cra crb crc cre cri crm cro crr crs csa csb csc cse csi csm cso csr css eaa eab eac eae eai eam eao ear eas eba ebb ebc ebe ebi ebm ebo ebr ebs ec- eca ecb ecc ece eci ecm eco ecr ecs eea eeb eec eee eem eeo eer ees eia eib eic eie eii eim eio eir eis em- ema emb emc eme emi emm emo emr ems eo- eoa eob eoc eoe eoi eom eoo eor eos era erb erc ere eri erm ero err ers es- esa esb esc ese esi esm eso esr ess ia- iaa iab iac iae iai iam iao iar ias iba ibb ibc ibe ibi ibm ibo ibr ibs ica icb icc ice ici icm ico icr ics ie- iea iec iee iei iem ier ies iia iib iic iie iii iim iio iir iis im- ima imb imc ime imi imm imo ims io- ioa iob ioc ioe ioi iom ioo ior ios ir- ira irb irc ire iri irm iro irr irs is- isa isb isc ise isi ism iso isr iss m-o m-r maa mab mac mae mai mam mao mar mas mba mbb mbc mbe mbi mbm mbo mbr mbs mc- mca mcb mcc mce mci mcm mco mcr mcs mea meb mec mee mei mem meo mer mes mi- mia mib mic mie mii mim mio mir mis mma mmb mmc mme mmi mmm mmo mmr mms moa mob moc moe moi mom moo mor mos mra mrb mrc mre mri mrm mro mrr mrs msa msb msc mse msi msm mso msr mss o-i oaa oab oac oae oai oam oao oar oas ob- oba obb obc obe obi obm obo obr obs oc- oca ocb occ oci ocm oco ocr ocs oea oeb oec oee oei oem oeo oer oes oia oib oic oie oii oim oio oir ois om- oma omb omc ome omi omm omo omr oms oo- ooa oob ooc ooi oom ooo oor oos or- ora orb orc ore ori orm oro orr ors os- osa osb osc ose osi osm oso osr oss ra- raa rab rac rae rai ram rao rar ras rba rbb rbc rbe rbi rbm rbo rbr rbs rca rcb rcc rce rci rcm rco rcr rcs re- rea reb rec ree rei rem reo rer res ria rib ric rie rii rim rio rir ris rma rmb rmc rme rmi rmm rmo rmr rms roa rob roc roe roi rom roo ror ros rra rrb rrc rri rrm rrr rrs rsa rsb rsc rse rsi rsm rso rsr rss saa sab sac sae sai sam sao sar sas sba sbb sbc sbe sbi sbm sbo sbr sbs sca scb scc sce sci scm sco scr scs se- sea seb sec see sei sem seo ser ses sia sib sic sie sii sim sio sir sis sma smb smc sme smi smm smo smr sms soa sob soc soe soi som soo sor sos sr- sra srb src sre sri srm sro srr srs ss- ssa ssb ssc sse ssi ssm sso ssr sss