-er -ic a-a a-b a-c a-i aaa aab aac aae aag aai aam aar aas ab- aba abb abc abe abg abi abm abr abs ac- aca acb acc ace acg aci acm acr acs aea aeb aec aee aeg aei aem aer aes ag- aga agb agc age agg agi agm agr ags ai- aia aib aic aie aig aii aim air ais ama amb amc ame amg ami amm amr ams ar- ara arb arc are arg ari arm arr ars as- asa asb asc ase asg asi asm asr ass baa bab bac bae bag bai bam bar bas bba bbb bbc bbe bbg bbi bbm bbr bbs bca bcb bcc bce bcg bci bcm bcr bcs be- bea beb bec bee beg bei bem ber bes bga bgb bgc bge bgg bgi bgm bgr bgs bi- bia bib bic bie big bii bim bir bis bma bmb bmc bme bmg bmi bmm bmr bms bra brb bre brg bri brm brr brs bsa bsb bsc bse bsg bsi bsm bsr bss c-- caa cab cac cae cag cai cam car cas cba cbb cbc cbe cbg cbi cbm cbr cbs cca ccb ccc cce ccg cci ccm ccr ccs ce- cea ceb cec cee ceg cei cem cer ces cga cgb cgc cge cgg cgi cgm cgr cgs ci- cia cib cic cie cig cii cim cir cis cma cmb cmc cme cmg cmi cmm cmr cms cra crb crc cre crg cri crm crr crs csa csb csc cse csg csi csm csr css eaa eab eac eae eag eai eam ear eas eba ebb ebc ebe ebg ebi ebm ebr ebs ec- eca ecb ecc ece ecg eci ecm ecr ecs eea eeb eec eee eeg eem eer ees ega egb egc ege egg egi egm egr egs eia eib eic eie eig eii eim eir eis em- ema emb emc eme emg emi emm emr ems era erb erc ere erg eri erm err ers es- esa esb esc ese esg esi esm esr ess gaa gab gac gae gag gai gam gar gas gba gbc gbe gbg gbi gbm gbr gbs gca gcb gcc gce gcg gci gcm gcr gcs ge- gea geb gec gee geg gei gem ger ges gga ggb ggc ggg ggi ggm ggr ggs gia gib gic gie gig gii gim gir gis gma gmb gmc gme gmg gmi gmm gmr gms gra grb grc gre grg gri grm grr grs gsa gsb gsc gse gsg gsi gsm gsr gss ia- iaa iab iac iae iag iai iam iar ias iba ibb ibc ibe ibg ibi ibm ibr ibs ica icb icc ice icg ici icm icr ics ie- iea iec iee ieg iei iem ier ies iga igb igc ige igg igi igm igr igs iia iib iic iie iii iim iir iis im- ima imb imc ime img imi imm ims ir- ira irb irc ire irg iri irm irr irs is- isa isb isc ise isg isi ism isr iss m-r maa mab mac mae mag mai mam mar mas mba mbb mbc mbe mbg mbi mbm mbr mbs mc- mca mcb mcc mce mcg mci mcm mcr mcs mea meb mec mee meg mei mem mer mes mga mgb mgc mge mgi mgm mgr mgs mi- mia mib mic mie mig mii mim mir mis mma mmb mmc mme mmg mmi mmm mmr mms mra mrb mrc mre mrg mri mrm mrr mrs msa msb msc mse msg msi msm msr mss ra- raa rab rac rae rag rai ram rar ras rba rbb rbc rbe rbg rbi rbm rbr rbs rca rcb rcc rce rcg rci rcm rcr rcs re- rea reb rec ree reg rei rem rer res rga rgb rgc rge rgg rgi rgr rgs ria rib ric rie rig rii rim rir ris rma rmb rmc rme rmg rmi rmm rmr rms rra rrb rrc rrg rri rrm rrr rrs rsa rsb rsc rse rsg rsi rsm rsr rss saa sab sac sae sag sai sam sar sas sba sbb sbc sbe sbg sbi sbm sbr sbs sca scb scc sce scg sci scm scr scs se- sea seb sec see seg sei sem ser ses sga sgb sgc sge sgg sgi sgm sgr sgs sia sib sic sie sig sii sim sir sis sma smb smc sme smg smi smm smr sms sr- sra srb src sre srg sri srm srr srs ss- ssa ssb ssc sse ssg ssi ssm ssr sss