-er -ic a-a a-b a-c a-i aaa aab aac aae aag aai aam aar ab- aba abb abc abe abg abi abm abr ac- aca acb acc ace acg aci acm acr aea aeb aec aee aeg aei aem aer ag- aga agb agc age agg agi agm agr ai- aia aib aic aie aig aii aim air ama amb amc ame amg ami amm amr ar- ara arb arc are arg ari arm arr baa bab bac bae bag bai bam bar bba bbb bbc bbe bbg bbi bbm bbr bca bcb bcc bce bcg bci bcm bcr be- bea beb bec bee beg bei bem ber bga bgb bgc bge bgg bgi bgm bgr bi- bia bib bic bie big bii bim bir bma bmb bmc bme bmg bmi bmm bmr bra brb bre brg bri brm brr c-- caa cab cac cae cag cai cam car cba cbb cbc cbe cbg cbi cbm cbr cca ccb ccc cce ccg cci ccm ccr ce- cea ceb cec cee ceg cei cem cer cga cgb cgc cge cgg cgi cgm cgr ci- cia cib cic cie cig cii cim cir cma cmb cmc cme cmg cmi cmm cmr cra crb crc cre crg cri crm crr eaa eab eac eae eag eai eam ear eba ebb ebc ebe ebg ebi ebm ebr ec- eca ecb ecc ece ecg eci ecm ecr eea eeb eec eee eeg eem eer ega egb egc ege egg egi egm egr eia eib eic eie eig eii eim eir em- ema emb emc eme emg emi emm emr era erb erc ere erg eri erm err gaa gab gac gae gag gai gam gar gba gbc gbe gbg gbi gbm gbr gca gcb gcc gce gcg gci gcm gcr ge- gea geb gec gee geg gei gem ger gga ggb ggc ggg ggi ggm ggr gia gib gic gie gig gii gim gir gma gmb gmc gme gmg gmi gmm gmr gra grb grc gre grg gri grm grr ia- iaa iab iac iae iag iai iam iar iba ibb ibc ibe ibg ibi ibm ibr ica icb icc ice icg ici icm icr ie- iea iec iee ieg iei iem ier iga igb igc ige igg igi igm igr iia iib iic iie iii iim iir im- ima imb imc ime img imi imm ir- ira irb irc ire irg iri irm irr m-r maa mab mac mae mag mai mam mar mba mbb mbc mbe mbg mbi mbm mbr mc- mca mcb mcc mce mcg mci mcm mcr mea meb mec mee meg mei mem mer mga mgb mgc mge mgi mgm mgr mi- mia mib mic mie mig mii mim mir mma mmb mmc mme mmg mmi mmm mmr mra mrb mrc mre mrg mri mrm mrr ra- raa rab rac rae rag rai ram rar rba rbb rbc rbe rbg rbi rbm rbr rca rcb rcc rce rcg rci rcm rcr re- rea reb rec ree reg rei rem rer rga rgb rgc rge rgg rgi rgr ria rib ric rie rig rii rim rir rma rmb rmc rme rmg rmi rmm rmr rra rrb rrc rrg rri rrm rrr