-er -ic a-a a-b a-c a-i aaa aab aac aae aag aai aak aan aar ab- aba abb abc abe abg abi abk abn abr ac- aca acb acc ace acg aci ack acn acr aea aeb aec aee aeg aei aek aen aer ag- aga agb agc age agg agi agk agn agr ai- aia aib aic aie aig aii aik ain air aka akb akc ake akg aki akk akn akr an- ana anb anc ane ang ani ank ann anr ar- ara arb arc are arg ari ark arn arr baa bab bac bae bag bai bak ban bar bba bbb bbc bbe bbg bbi bbk bbn bbr bca bcb bcc bce bcg bci bck bcn bcr be- bea beb bec bee beg bei bek ben ber bga bgb bgc bge bgg bgi bgk bgn bgr bi- bia bib bic bie big bii bik bin bir bka bkb bkc bke bkg bkk bkn bkr bna bnb bnc bne bng bni bnk bnn bnr bra brb bre brg bri brk brn brr c-- caa cab cac cae cag cai cak can car cba cbb cbc cbe cbg cbi cbk cbn cbr cca ccb ccc cce ccg cci cck ccn ccr ce- cea ceb cec cee ceg cei cek cen cer cga cgb cgc cge cgg cgi cgn cgr ci- cia cib cic cie cig cii cik cin cir cka ckb ckc cki cn- cna cnb cnc cne cng cni cnn cnr cra crb crc cre crg cri crk crn crr eaa eab eac eae eag eai eak ean ear eba ebb ebc ebe ebg ebi ebk ebn ebr ec- eca ecb ecc ece ecg eci eck ecn ecr eea eeb eec eee eeg eek een eer ega egb egc ege egg egi egn egr eia eib eic eie eig eii eik ein eir eka ekb ekc eke ekg eki ekr en- ena enb enc ene eng eni enk enn enr era erb erc ere erg eri erk ern err gaa gab gac gae gag gai gak gan gar gba gbc gbe gbg gbi gbk gbn gbr gca gcb gcc gce gcg gci gck gcn gcr ge- gea geb gec gee geg gei gek gen ger gga ggb ggc ggg ggi ggn ggr gia gib gic gie gig gii gik gin gir gka gkb gkn gna gnb gnc gne gni gnn gnr gra grb grc gre grg gri grk grn grr ia- iaa iab iac iae iag iai ian iar iba ibb ibc ibe ibg ibi ibk ibn ibr ica icb icc ice icg ici ick icn icr ie- iea iec iee ieg iei iek ien ier iga igb igc ige igg igi igk ign igr iia iib iic iie iii iin iir ika ikb ikc ike iki ikk ikr in- ina inb inc ine ing ini ink inn inr ir- ira irb irc ire irg iri irk irn irr ka- kaa kab kac kae kag kai kak kan kar kba kbb kbc kbe kbi kbk kbn kbr kca kcb kcc kce kcg kci kck kcn kcr ke- kea keb kec kee keg kei kek ken ker kga kgb kgc kgi kia kib kic kie kig kii kik kin kir kkb kkc kke kki kkk kkn kkr kn- kna knc kne kng kni knk knn knr kra krc krg kri krk krn krr n-i naa nab nac nae nag nai nak nan nar nba nbb nbc nbe nbg nbi nbk nbn nbr nca ncb ncc nce ncg nci nck ncn ncr ne- nea neb nec nee neg nei nek nen ner nga ngb ngc nge ngg ngi ngk ngn nia nib nic nie nig nii nik nin nir nka nkc nke nki nkk nkn nkr nna nnb nnc nne nng nni nnk nnn nra nrb nrc nre nrg nri nrk nrn nrr ra- raa rab rac rae rag rai rak ran rar rba rbb rbc rbe rbg rbi rbk rbn rbr rca rcb rcc rce rcg rci rcn rcr re- rea reb rec ree reg rei rek ren rer rga rgb rgc rge rgg rgi rgk rgn rgr ria rib ric rie rig rii rik rin rir rkb rkc rke rkg rkk rna rnb rnc rng rni rnn rnr rra rrb rrc rrg rri rrk rrn rrr