-er -ic a-a a-b a-c a-i aaa aab aac aae aaf aai aak aam aao aar ab- aba abb abc abe abf abi abk abm abo abr ac- aca acb acc ace acf aci ack acm aco acr aea aeb aec aee aef aei aek aem aeo aer af- afa afb afc afe aff afi afk afm afo afr ai- aia aib aic aie aif aii aik aim aio air aka akb akc ake aki akk akm ako akr ama amb amc ame amf ami amk amm amo amr aoa aob aoc aoe aof aoi aok aom aoo aor ar- ara arb arc are arf ari ark arm aro arr baa bab bac bae baf bai bak bam bao bar bba bbb bbc bbe bbf bbi bbk bbm bbo bbr bca bcb bcc bce bcf bci bck bcm bco bcr be- bea beb bec bee bef bei bek bem beo ber bfa bfb bfc bfe bff bfi bfm bfo bfr bi- bia bib bic bie bif bii bik bim bio bir bka bkb bkc bke bkf bkk bkm bko bkr bma bmb bmc bme bmf bmi bmk bmm bmo bmr boa bob boc boe bof boi bok bom boo bor bra brb bre brf bri brk brm bro brr c-- caa cab cac cae caf cai cak cam cao car cba cbb cbc cbe cbf cbi cbk cbm cbo cbr cca ccb ccc cce ccf cci cck ccm cco ccr ce- cea ceb cec cee cef cei cek cem ceo cer cfa cfb cfc cfe cff cfi cfk cfm cfo cfr ci- cia cib cic cie cif cii cik cim cio cir cka ckb ckc cki ckm cko cma cmb cmc cme cmf cmi cmk cmm cmo cmr co- coa cob coc coe cof coi cok com coo cor cra crb crc cre crf cri crk crm cro crr eaa eab eac eae eaf eai eak eam eao ear eba ebb ebc ebe ebf ebi ebk ebm ebo ebr ec- eca ecb ecc ece ecf eci eck ecm eco ecr eea eeb eec eee eef eek eem eeo eer ef- efa efb efc efe eff efi efm efo efr eia eib eic eie eif eii eik eim eio eir eka ekb ekc eke ekf eki eko ekr em- ema emb emc eme emf emi emk emm emo emr eo- eoa eob eoc eoe eof eoi eok eom eoo eor era erb erc ere erf eri erk erm ero err faa fab fac fae faf fai fak fam fao far fba fbb fbc fbe fbf fbi fbk fbm fbo fbr fca fcb fcc fce fcf fci fck fcm fco fcr fea feb fec fee fef fei fek fem feo fer ffa ffc ffe fff ffi ffk ffm ffo ffr fia fib fic fie fif fii fik fim fir fka fkb fkc fkf fki fkk fkm fma fmb fmc fme fmf fmi fmm fmo fmr foa fob foc foe fof foi fok fom foo for fra frb frc fre frf fri frk frm fro frr i-f ia- iaa iab iac iae iaf iai iam iao iar iba ibb ibc ibe ibf ibi ibk ibm ibo ibr ica icb icc ice icf ici ick icm ico icr ie- iea iec iee ief iei iek iem ier ifa ifb ifc ife iff ifi ifm ifo ifr iia iib iic iie iif iii iim iio iir ika ikb ikc ike ikf iki ikk iko ikr im- ima imb imc ime imf imi imm imo io- ioa iob ioc ioe iof ioi iom ioo ior ir- ira irb irc ire irf iri irk irm iro irr ka- kaa kab kac kae kaf kai kak kam kao kar kba kbb kbc kbe kbf kbi kbk kbm kbo kbr kca kcb kcc kce kci kck kcm kcr ke- kea keb kec kee kef kei kek kem keo ker kfa kfc kff kfi kfm kfo kia kib kic kie kif kii kik kim kio kir kkb kkc kke kki kkk kkm kkr kma kmb kmc kme kmf kmi kmk kmm kmo koa kob koc koe kof koi kok kom koo kor kra krc krf kri krk kro krr m-f m-o m-r maa mab mac mae maf mai mak mam mao mar mba mbb mbc mbe mbf mbi mbk mbm mbo mbr mc- mca mcb mcc mce mcf mci mck mcm mco mcr mea meb mec mee mef mei mek mem meo mer mfa mfb mfc mfe mff mfi mfm mfo mfr mi- mia mib mic mie mif mii mik mim mio mir mka mkb mkc mke mkk mkm mko mkr mma mmb mmc mme mmf mmi mmk mmm mmo mmr moa mob moc moe mof moi mok mom moo mor mra mrb mrc mre mrf mri mrk mrm mro mrr o-i oaa oab oac oae oaf oai oak oam oao oar ob- oba obb obc obe obf obi obk obm obo obr oc- oca ocb occ ocf oci ock ocm oco ocr oea oeb oec oee oef oei oem oeo oer of- ofa ofb ofc ofe off ofi ofm ofo ofr oia oib oic oie oif oii oik oim oio oir oka okb okc oke oki okk oko okr om- oma omb omc ome omf omi omm omo omr oo- ooa oob ooc oof ooi ook oom ooo oor or- ora orb orc ore orf ori ork orm oro orr ra- raa rab rac rae raf rai rak ram rao rar rba rbb rbc rbe rbf rbi rbk rbm rbo rbr rca rcb rcc rce rcf rci rcm rco rcr re- rea reb rec ree ref rei rek rem reo rer rfa rfb rfc rfe rff rfi rfk rfm rfo rfr ria rib ric rie rif rii rik rim rio rir rkb rkc rke rkf rkk rkm rko rma rmb rmc rme rmf rmi rmm rmo rmr roa rob roc roe rof roi rok rom roo ror rra rrb rrc rrf rri rrk rrm rrr