-ic a-a a-b a-c a-i aaa aab aac aaf aai aam aao aar ab- aba abb abc abf abi abm abo abr ac- aca acb acc acf aci acm aco acr af- afa afb afc aff afi afm afo afr ai- aia aib aic aif aii aim aio air ama amb amc amf ami amm amo amr aoa aob aoc aof aoi aom aoo aor ar- ara arb arc arf ari arm aro arr baa bab bac baf bai bam bao bar bba bbb bbc bbf bbi bbm bbo bbr bca bcb bcc bcf bci bcm bco bcr bfa bfb bfc bff bfi bfm bfo bfr bi- bia bib bic bif bii bim bio bir bma bmb bmc bmf bmi bmm bmo bmr boa bob boc bof boi bom boo bor bra brb brf bri brm bro brr c-- caa cab cac caf cai cam cao car cba cbb cbc cbf cbi cbm cbo cbr cca ccb ccc ccf cci ccm cco ccr cfa cfb cfc cff cfi cfm cfo cfr ci- cia cib cic cif cii cim cio cir cma cmb cmc cmf cmi cmm cmo cmr co- coa cob coc cof coi com coo cor cra crb crc crf cri crm cro crr faa fab fac faf fai fam fao far fba fbb fbc fbf fbi fbm fbo fbr fca fcb fcc fcf fci fcm fco fcr ffa ffc fff ffi ffm ffo ffr fia fib fic fif fii fim fir fma fmb fmc fmf fmi fmm fmo fmr foa fob foc fof foi fom foo for fra frb frc frf fri frm fro frr i-f ia- iaa iab iac iaf iai iam iao iar iba ibb ibc ibf ibi ibm ibo ibr ica icb icc icf ici icm ico icr ifa ifb ifc iff ifi ifm ifo ifr iia iib iic iif iii iim iio iir im- ima imb imc imf imi imm imo io- ioa iob ioc iof ioi iom ioo ior ir- ira irb irc irf iri irm iro irr m-f m-o m-r maa mab mac maf mai mam mao mar mba mbb mbc mbf mbi mbm mbo mbr mc- mca mcb mcc mcf mci mcm mco mcr mfa mfb mfc mff mfi mfm mfo mfr mi- mia mib mic mif mii mim mio mir mma mmb mmc mmf mmi mmm mmo mmr moa mob moc mof moi mom moo mor mra mrb mrc mrf mri mrm mro mrr o-i oaa oab oac oaf oai oam oao oar ob- oba obb obc obf obi obm obo obr oc- oca ocb occ ocf oci ocm oco ocr of- ofa ofb ofc off ofi ofm ofo ofr oia oib oic oif oii oim oio oir om- oma omb omc omf omi omm omo omr oo- ooa oob ooc oof ooi oom ooo oor or- ora orb orc orf ori orm oro orr ra- raa rab rac raf rai ram rao rar rba rbb rbc rbf rbi rbm rbo rbr rca rcb rcc rcf rci rcm rco rcr rfa rfb rfc rff rfi rfm rfo rfr ria rib ric rif rii rim rio rir rma rmb rmc rmf rmi rmm rmo rmr roa rob roc rof roi rom roo ror rra rrb rrc rrf rri rrm rrr