a-a a-c a-t aaa aac aad aaf aak aar aat aau ac- aca acc acd acf ack acr act acu ad- ada adc add adf adk adr adt adu af- afa afc afd aff afk afr aft afu aka akc akd akk akr aku ar- ara arc ard arf ark arr art aru at- ata atc atd atf atr att atu au- aua auc aud auf auk aur aut c-- caa cac cad caf cak car cat cau cca ccc ccd ccf cck ccr cct ccu cda cdc cdd cdf cdk cdr cdt cdu cfa cfc cfd cff cfk cfr cft cfu cka ckc ckd ckt cra crc crd crf crk crr crt cru cta ctc ctd ctf ctk ctr ctt ctu cua cuc cud cuf cuk cur cut cuu daa dac dad daf dak dar dat dau dca dcc dcd dcf dck dcr dct dcu dda ddc ddd ddf ddk ddr ddt ddu dfa dfc dfd dff dfk dfr dft dfu dka dkc dkk dkr dkt dku dra drc drd drk drr drt dru dta dtc dtd dtf dtk dtr dtt dtu dua duc dud duf duk dur dut faa fac fad faf fak far fat fau fca fcc fcd fcf fck fcr fct fcu fda fdc fdd fdf fdk fdr fdt fdu ffa ffc ffd fff ffk ffr fft ffu fka fkc fkf fkk fkt fra frc frd frf frk frr frt fru fta ftc ftd ftf ftk ftr ftt ftu fua fud fuf fuk fur fut fuu k-t ka- kaa kac kad kaf kak kar kat kau kca kcc kcd kck kcr kct kcu kda kdc kdf kdk kdr kdt kdu kfa kfc kfd kff kfu kkc kkk kkr kkt kku kra krc krd krf krk krr krt kru kta ktc ktf ktk ktr ktt ktu kuc kud kuk kur kut kuu ra- raa rac rad raf rak rar rat rau rca rcc rcd rcf rcr rct rcu rda rdc rdd rdf rdr rdt rdu rfa rfc rfd rff rfk rfr rft rfu rkc rkf rkk rkt rku rra rrc rrd rrf rrk rrr rrt rru rta rtc rtd rtf rtk rtr rtt rtu rua ruc rud ruf ruk rur rut ruu taa tac tad taf tak tar tat tau tca tcc tcd tcf tck tcr tct tcu tda tdc tdd tdf tdk tdr tdt tdu tfa tfc tfd tff tfk tfr tft tfu tka tkc tkk tkr tkt tra trc trd trf trk trr trt tru tta ttc ttd ttf ttk ttr ttt ttu tua tuc tud tuf tuk tur tut tuu ua- uaa uac uad uaf uak uar uat uau uca ucc ucd ucf uck ucr uct ucu uda udc udd udf udk udr udt udu ufa ufc ufd uff ufr uft ufu uka ukc ukf ukk ukr uku ur- ura urc urd urf urk urr urt uru uta utc utd utf utk utr utt utu uua uuc uur uut uuu