-ic a-a a-b a-c a-i a-t aaa aab aac aaf aai aam aao aar aat ab- aba abb abc abf abi abm abo abr abt ac- aca acb acc acf aci acm aco acr act af- afa afb afc aff afi afm afo afr aft ai- aia aib aic aif aii aim aio air ait ama amb amc amf ami amm amo amr amt aoa aob aoc aof aoi aom aoo aor aot ar- ara arb arc arf ari arm aro arr art at- ata atb atc atf ati atm ato atr att baa bab bac baf bai bam bao bar bat bba bbb bbc bbf bbi bbm bbo bbr bbt bca bcb bcc bcf bci bcm bco bcr bct bfa bfb bfc bff bfi bfm bfo bfr bft bi- bia bib bic bif bii bim bio bir bit bma bmb bmc bmf bmi bmm bmo bmr bmt boa bob boc bof boi bom boo bor bot bra brb brf bri brm bro brr brt bta btb btc btf bti btm bto btr btt c-- caa cab cac caf cai cam cao car cat cba cbb cbc cbf cbi cbm cbo cbr cbt cca ccb ccc ccf cci ccm cco ccr cct cfa cfb cfc cff cfi cfm cfo cfr cft ci- cia cib cic cif cii cim cio cir cit cma cmb cmc cmf cmi cmm cmo cmr cmt co- coa cob coc cof coi com coo cor cot cra crb crc crf cri crm cro crr crt cta ctb ctc ctf cti ctm cto ctr ctt faa fab fac faf fai fam fao far fat fba fbb fbc fbf fbi fbm fbo fbr fbt fca fcb fcc fcf fci fcm fco fcr fct ffa ffc fff ffi ffm ffo ffr fft fia fib fic fif fii fim fir fit fma fmb fmc fmf fmi fmm fmo fmr fmt foa fob foc fof foi fom foo for fot fra frb frc frf fri frm fro frr frt fta ftb ftc ftf fti ftm fto ftr ftt i-f ia- iaa iab iac iaf iai iam iao iar iat iba ibb ibc ibf ibi ibm ibo ibr ibt ica icb icc icf ici icm ico icr ict ifa ifb ifc iff ifi ifm ifo ifr ift iia iib iic iif iii iim iio iir iit im- ima imb imc imf imi imm imo imt io- ioa iob ioc iof ioi iom ioo ior iot ir- ira irb irc irf iri irm iro irr irt ita itb itc itf iti itm ito itt m-f m-o m-r maa mab mac maf mai mam mao mar mat mba mbb mbc mbf mbi mbm mbo mbr mbt mc- mca mcb mcc mcf mci mcm mco mcr mct mfa mfb mfc mff mfi mfm mfo mfr mft mi- mia mib mic mif mii mim mio mir mit mma mmb mmc mmf mmi mmm mmo mmr mmt moa mob moc mof moi mom moo mor mot mra mrb mrc mrf mri mrm mro mrr mrt mta mtb mtc mtf mti mtm mto mtr mtt o-i oaa oab oac oaf oai oam oao oar oat ob- oba obb obc obf obi obm obo obr obt oc- oca ocb occ ocf oci ocm oco ocr oct of- ofa ofb ofc off ofi ofm ofo ofr oft oia oib oic oif oii oim oio oir oit om- oma omb omc omf omi omm omo omr omt oo- ooa oob ooc oof ooi oom ooo oor oot or- ora orb orc orf ori orm oro orr ort ot- ota otb otc otf oti otm oto otr ott ra- raa rab rac raf rai ram rao rar rat rba rbb rbc rbf rbi rbm rbo rbr rbt rca rcb rcc rcf rci rcm rco rcr rct rfa rfb rfc rff rfi rfm rfo rfr rft ria rib ric rif rii rim rio rir rit rma rmb rmc rmf rmi rmm rmo rmr rmt roa rob roc rof roi rom roo ror rot rra rrb rrc rrf rri rrm rrr rrt rta rtb rtc rtf rti rtm rto rtr rtt taa tab tac taf tai tam tao tar tat tba tbb tbc tbf tbi tbm tbo tbr tbt tca tcb tcc tcf tci tcm tco tcr tct tfa tfb tfc tff tfi tfm tfo tfr tft tia tib tic tif tii tim tio tir tit tma tmb tmc tmf tmi tmm tmo tmr tmt to- toa tob toc tof toi tom too tor tot tra trb trc trf tri trm tro trr trt tta ttb ttc ttf tti ttm tto ttr ttt