a-a a-c a-t aaa aac aaf aao aar aat aau aax ac- aca acc acf aco acr act acu acx af- afa afc aff afo afr aft afu afx aoa aoc aof aoo aor aot aou aox ar- ara arc arf aro arr art aru arx at- ata atc atf ato atr att atu atx au- aua auc auf auo aur aut aux ax- axa axo axr axt axx c-- caa cac caf cao car cat cau cax cca ccc ccf cco ccr cct ccu ccx cfa cfc cff cfo cfr cft cfu cfx co- coa coc cof coo cor cot cou cox cra crc crf cro crr crt cru crx cta ctc ctf cto ctr ctt ctu ctx cua cuc cuf cuo cur cut cuu cxc cxf cxo cxr cxt cxx faa fac faf fao far fat fau fax fca fcc fcf fco fcr fct fcu fcx ffa ffc fff ffo ffr fft ffu ffx foa foc fof foo for fot fou fox fra frc frf fro frr frt fru fta ftc ftf fto ftr ftt ftu ftx fua fuf fuo fur fut fuu fux fxr fxt fxu fxx oaa oac oaf oao oar oat oau oax oc- oca occ ocf oco ocr oct ocu ocx of- ofa ofc off ofo ofr oft ofu ofx oo- ooa ooc oof ooo oor oot oox or- ora orc orf oro orr ort oru orx ot- ota otc otf oto otr ott otu ou- oua ouc ouf ouo our out ox- oxa oxc oxf oxo oxt oxx ra- raa rac raf rao rar rat rau rax rca rcc rcf rco rcr rct rcu rcx rfa rfc rff rfo rfr rft rfu roa roc rof roo ror rot rou rox rra rrc rrf rrr rrt rru rta rtc rtf rto rtr rtt rtu rtx rua ruc ruf ruo rur rut ruu rux rxr t-x taa tac taf tao tar tat tau tax tca tcc tcf tco tcr tct tcu tcx tfa tfc tff tfo tfr tft tfu tfx to- toa toc tof too tor tot tou tox tra trc trf tro trr trt tru trx tta ttc ttf tto ttr ttt ttu ttx tua tuc tuf tuo tur tut tuu tux txf txt txu ua- uaa uac uaf uao uar uat uau uca ucc ucf uco ucr uct ucu ufa ufc uff ufo ufr uft ufu ufx uoa uoc uoo uor uot uox ur- ura urc urf uro urr urt uru urx uta utc utf uto utr utt utu utx uua uuc uur uut uuu uxc uxf uxo uxr uxt uxu xaa xac xaf xar xat xau xcf xcr xcx xfa xft xfx xoa xoc xof xoo xor xot xox xrc xrf xrt xrx xtc xtf xtr xtx xxo xxx