-er -ic a-a a-b a-c a-i aaa aab aac aae aag aai aam aao aar ab- aba abb abc abe abg abi abm abo abr ac- aca acb acc ace acg aci acm aco acr aea aeb aec aee aeg aei aem aeo aer ag- aga agb agc age agg agi agm ago agr ai- aia aib aic aie aig aii aim aio air ama amb amc ame amg ami amm amo amr aoa aob aoc aoe aog aoi aom aoo aor ar- ara arb arc are arg ari arm aro arr baa bab bac bae bag bai bam bao bar bba bbb bbc bbe bbg bbi bbm bbo bbr bca bcb bcc bce bcg bci bcm bco bcr be- bea beb bec bee beg bei bem beo ber bga bgb bgc bge bgg bgi bgm bgo bgr bi- bia bib bic bie big bii bim bio bir bma bmb bmc bme bmg bmi bmm bmo bmr boa bob boc boe bog boi bom boo bor bra brb bre brg bri brm bro brr c-- caa cab cac cae cag cai cam cao car cba cbb cbc cbe cbg cbi cbm cbo cbr cca ccb ccc cce ccg cci ccm cco ccr ce- cea ceb cec cee ceg cei cem ceo cer cga cgb cgc cge cgg cgi cgm cgo cgr ci- cia cib cic cie cig cii cim cio cir cma cmb cmc cme cmg cmi cmm cmo cmr co- coa cob coc coe cog coi com coo cor cra crb crc cre crg cri crm cro crr eaa eab eac eae eag eai eam eao ear eba ebb ebc ebe ebg ebi ebm ebo ebr ec- eca ecb ecc ece ecg eci ecm eco ecr eea eeb eec eee eeg eem eeo eer ega egb egc ege egg egi egm ego egr eia eib eic eie eig eii eim eio eir em- ema emb emc eme emg emi emm emo emr eo- eoa eob eoc eoe eog eoi eom eoo eor era erb erc ere erg eri erm ero err gaa gab gac gae gag gai gam gao gar gba gbc gbe gbg gbi gbm gbo gbr gca gcb gcc gce gcg gci gcm gco gcr ge- gea geb gec gee geg gei gem geo ger gga ggb ggc ggg ggi ggm ggo ggr gia gib gic gie gig gii gim gio gir gma gmb gmc gme gmg gmi gmm gmo gmr goa gob goc goe gog goi gom goo gor gra grb grc gre grg gri grm gro grr ia- iaa iab iac iae iag iai iam iao iar iba ibb ibc ibe ibg ibi ibm ibo ibr ica icb icc ice icg ici icm ico icr ie- iea iec iee ieg iei iem ier iga igb igc ige igg igi igm igo igr iia iib iic iie iii iim iio iir im- ima imb imc ime img imi imm imo io- ioa iob ioc ioe iog ioi iom ioo ior ir- ira irb irc ire irg iri irm iro irr m-o m-r maa mab mac mae mag mai mam mao mar mba mbb mbc mbe mbg mbi mbm mbo mbr mc- mca mcb mcc mce mcg mci mcm mco mcr mea meb mec mee meg mei mem meo mer mga mgb mgc mge mgi mgm mgo mgr mi- mia mib mic mie mig mii mim mio mir mma mmb mmc mme mmg mmi mmm mmo mmr moa mob moc moe mog moi mom moo mor mra mrb mrc mre mrg mri mrm mro mrr o-i oaa oab oac oae oag oai oam oao oar ob- oba obb obc obe obg obi obm obo obr oc- oca ocb occ ocg oci ocm oco ocr oea oeb oec oee oeg oei oem oeo oer oga ogc oge ogg ogi ogo oia oib oic oie oii oim oio oir om- oma omb omc ome omg omi omm omo omr oo- ooa oob ooc oog ooi oom ooo oor or- ora orb orc ore org ori orm oro orr ra- raa rab rac rae rag rai ram rao rar rba rbb rbc rbe rbg rbi rbm rbo rbr rca rcb rcc rce rcg rci rcm rco rcr re- rea reb rec ree reg rei rem reo rer rga rgb rgc rge rgg rgi rgo rgr ria rib ric rie rig rii rim rio rir rma rmb rmc rme rmg rmi rmm rmo rmr roa rob roc roe rog roi rom roo ror rra rrb rrc rrg rri rrm rrr