-er -ic a-a a-b a-c a-i aaa aab aac aae aai aam aar aas ab- aba abb abc abe abi abm abr abs ac- aca acb acc ace aci acm acr acs aea aeb aec aee aei aem aer aes ai- aia aib aic aie aii aim air ais ama amb amc ame ami amm amr ams ar- ara arb arc are ari arm arr ars as- asa asb asc ase asi asm asr ass baa bab bac bae bai bam bar bas bba bbb bbc bbe bbi bbm bbr bbs bca bcb bcc bce bci bcm bcr bcs be- bea beb bec bee bei bem ber bes bi- bia bib bic bie bii bim bir bis bma bmb bmc bme bmi bmm bmr bms bra brb bre bri brm brr brs bsa bsb bsc bse bsi bsm bsr bss c-- caa cab cac cae cai cam car cas cba cbb cbc cbe cbi cbm cbr cbs cca ccb ccc cce cci ccm ccr ccs ce- cea ceb cec cee cei cem cer ces ci- cia cib cic cie cii cim cir cis cma cmb cmc cme cmi cmm cmr cms cra crb crc cre cri crm crr crs csa csb csc cse csi csm csr css eaa eab eac eae eai eam ear eas eba ebb ebc ebe ebi ebm ebr ebs ec- eca ecb ecc ece eci ecm ecr ecs eea eeb eec eee eem eer ees eia eib eic eie eii eim eir eis em- ema emb emc eme emi emm emr ems era erb erc ere eri erm err ers es- esa esb esc ese esi esm esr ess ia- iaa iab iac iae iai iam iar ias iba ibb ibc ibe ibi ibm ibr ibs ica icb icc ice ici icm icr ics ie- iea iec iee iei iem ier ies iia iib iic iie iii iim iir iis im- ima imb imc ime imi imm ims ir- ira irb irc ire iri irm irr irs is- isa isb isc ise isi ism isr iss m-r maa mab mac mae mai mam mar mas mba mbb mbc mbe mbi mbm mbr mbs mc- mca mcb mcc mce mci mcm mcr mcs mea meb mec mee mei mem mer mes mi- mia mib mic mie mii mim mir mis mma mmb mmc mme mmi mmm mmr mms mra mrb mrc mre mri mrm mrr mrs msa msb msc mse msi msm msr mss ra- raa rab rac rae rai ram rar ras rba rbb rbc rbe rbi rbm rbr rbs rca rcb rcc rce rci rcm rcr rcs re- rea reb rec ree rei rem rer res ria rib ric rie rii rim rir ris rma rmb rmc rme rmi rmm rmr rms rra rrb rrc rri rrm rrr rrs rsa rsb rsc rse rsi rsm rsr rss saa sab sac sae sai sam sar sas sba sbb sbc sbe sbi sbm sbr sbs sca scb scc sce sci scm scr scs se- sea seb sec see sei sem ser ses sia sib sic sie sii sim sir sis sma smb smc sme smi smm smr sms sr- sra srb src sre sri srm srr srs ss- ssa ssb ssc sse ssi ssm ssr sss