-ic a-a a-b a-c a-i a-t aaa aab aac aaf aai aao aar aat aau ab- aba abb abc abf abi abo abr abt abu ac- aca acb acc acf aci aco acr act acu af- afa afb afc aff afi afo afr aft afu ai- aia aib aic aif aii aio air ait aiu aoa aob aoc aof aoi aoo aor aot aou ar- ara arb arc arf ari aro arr art aru at- ata atb atc atf ati ato atr att atu au- aua aub auc auf aui auo aur aut b-u baa bab bac baf bai bao bar bat bau bba bbb bbc bbf bbi bbo bbr bbt bbu bca bcb bcc bcf bci bco bcr bct bcu bfa bfb bfc bff bfi bfo bfr bft bfu bi- bia bib bic bif bii bio bir bit biu boa bob boc bof boi boo bor bot bou bra brb brf bri bro brr brt bru bta btb btc btf bti bto btr btt btu bua bub buc buf bui buo bur but buu c-- caa cab cac caf cai cao car cat cau cba cbb cbc cbf cbi cbo cbr cbt cbu cca ccb ccc ccf cci cco ccr cct ccu cfa cfb cfc cff cfi cfo cfr cft cfu ci- cia cib cic cif cii cio cir cit ciu co- coa cob coc cof coi coo cor cot cou cra crb crc crf cri cro crr crt cru cta ctb ctc ctf cti cto ctr ctt ctu cua cub cuc cuf cui cuo cur cut cuu faa fab fac faf fai fao far fat fau fba fbb fbc fbf fbi fbo fbr fbt fbu fca fcb fcc fcf fci fco fcr fct fcu ffa ffc fff ffi ffo ffr fft ffu fia fib fic fif fii fir fit fiu foa fob foc fof foi foo for fot fou fra frb frc frf fri fro frr frt fru fta ftb ftc ftf fti fto ftr ftt ftu fua fub fuf fui fuo fur fut fuu i-f ia- iaa iab iac iaf iai iao iar iat iau iba ibb ibc ibf ibi ibo ibr ibt ibu ica icb icc icf ici ico icr ict icu ifa ifb ifc iff ifi ifo ifr ift ifu iia iib iic iif iii iio iir iit iiu io- ioa iob ioc iof ioi ioo ior iot iou ir- ira irb irc irf iri iro irr irt iru ita itb itc itf iti ito itt itu iu- iua iub iuc iui iur iut o-i oaa oab oac oaf oai oao oar oat oau ob- oba obb obc obf obi obo obr obt obu oc- oca ocb occ ocf oci oco ocr oct ocu of- ofa ofb ofc off ofi ofo ofr oft ofu oia oib oic oif oii oio oir oit oiu oo- ooa oob ooc oof ooi ooo oor oot or- ora orb orc orf ori oro orr ort oru ot- ota otb otc otf oti oto otr ott otu ou- oua ouc ouf oui ouo our out ra- raa rab rac raf rai rao rar rat rau rba rbb rbc rbf rbi rbo rbr rbt rbu rca rcb rcc rcf rci rco rcr rct rcu rfa rfb rfc rff rfi rfo rfr rft rfu ria rib ric rif rii rio rir rit roa rob roc rof roi roo ror rot rou rra rrb rrc rrf rri rrr rrt rru rta rtb rtc rtf rti rto rtr rtt rtu rua rub ruc ruf rui ruo rur rut ruu taa tab tac taf tai tao tar tat tau tba tbb tbc tbf tbi tbo tbr tbt tbu tca tcb tcc tcf tci tco tcr tct tcu tfa tfb tfc tff tfi tfo tfr tft tfu tia tib tic tif tii tio tir tit tiu to- toa tob toc tof toi too tor tot tou tra trb trc trf tri tro trr trt tru tta ttb ttc ttf tti tto ttr ttt ttu tua tub tuc tuf tui tuo tur tut tuu ua- uaa uab uac uaf uai uao uar uat uau uba ubb ubc ubf ubi ubo ubr ubt ubu uca ucb ucc ucf uci uco ucr uct ucu ufa ufc uff ufi ufo ufr uft ufu uia uib uic uif uii uio uir uit uiu uoa uob uoc uoo uor uot ur- ura urb urc urf uri uro urr urt uru uta utb utc utf uti uto utr utt utu uua uuc uur uut uuu