-ic a-a a-b a-c a-i a-t aaa aab aac aai aan aar aas aat aau ab- aba abb abc abi abn abr abs abt abu ac- aca acb acc aci acn acr acs act acu ai- aia aib aic aii ain air ais ait aiu an- ana anb anc ani ann anr ans ant anu ar- ara arb arc ari arn arr ars art aru as- asa asb asc asi asn asr ass ast asu at- ata atb atc ati atn atr ats att atu au- aua aub auc aui aun aur aus aut b-u baa bab bac bai ban bar bas bat bau bba bbb bbc bbi bbn bbr bbs bbt bbu bca bcb bcc bci bcn bcr bcs bct bcu bi- bia bib bic bii bin bir bis bit biu bna bnb bnc bni bnn bnr bns bnt bnu bra brb bri brn brr brs brt bru bsa bsb bsc bsi bsn bsr bss bst bsu bta btb btc bti btn btr bts btt btu bua bub buc bui bun bur bus but buu c-- caa cab cac cai can car cas cat cau cba cbb cbc cbi cbn cbr cbs cbt cbu cca ccb ccc cci ccn ccr ccs cct ccu ci- cia cib cic cii cin cir cis cit ciu cn- cna cnb cnc cni cnn cnr cns cnt cnu cra crb crc cri crn crr crs crt cru csa csb csc csi csn csr css cst csu cta ctb ctc cti ctn ctr cts ctt ctu cua cub cuc cui cun cur cus cut cuu ia- iaa iab iac iai ian iar ias iat iau iba ibb ibc ibi ibn ibr ibs ibt ibu ica icb icc ici icn icr ics ict icu iia iib iic iii iin iir iis iit iiu in- ina inb inc ini inn inr ins int inu ir- ira irb irc iri irn irr irs irt iru is- isa isb isc isi isn isr iss ist isu ita itb itc iti itn its itt itu iu- iua iub iuc iui iur ius iut n-i naa nab nac nai nan nar nas nat nau nba nbb nbc nbi nbn nbr nbs nbt nbu nca ncb ncc nci ncn ncr ncs nct ncu nia nib nic nii nin nir nis nit niu nna nnb nnc nni nnn nns nnt nnu nra nrb nrc nri nrn nrr nrs nrt nru nsa nsb nsc nsi nsn nsr nss nst nsu nta ntb ntc nti ntn ntr nts ntt ntu nua nub nuc nui nun nur nus nut nuu ra- raa rab rac rai ran rar ras rat rau rba rbb rbc rbi rbn rbr rbs rbt rbu rca rcb rcc rci rcn rcr rcs rct rcu ria rib ric rii rin rir ris rit rna rnb rnc rni rnn rnr rns rnt rnu rra rrb rrc rri rrn rrr rrs rrt rru rsa rsb rsc rsi rsn rsr rss rst rsu rta rtb rtc rti rtn rtr rts rtt rtu rua rub ruc rui run rur rus rut ruu saa sab sac sai san sar sas sat sau sba sbb sbc sbi sbn sbr sbs sbt sbu sca scb scc sci scn scr scs sct scu sia sib sic sii sin sir sis sit siu sna snb snc sni snn snr sns snt snu sr- sra srb src sri srn srr srs srt ss- ssa ssb ssc ssi ssn ssr sss sst ssu sta stb stc sti stn str sts stt stu sua sub suc sui sun sur sus sut suu taa tab tac tai tan tar tas tat tau tba tbb tbc tbi tbn tbr tbs tbt tbu tca tcb tcc tci tcn tcr tcs tct tcu tia tib tic tii tin tir tis tit tiu tna tnb tnc tni tnn tnr tns tnt tra trb trc tri trn trr trs trt tru tsa tsb tsc tsi tsn tsr tss tst tsu tta ttb ttc tti ttn ttr tts ttt ttu tua tub tuc tui tun tur tus tut tuu ua- uaa uab uac uai uan uar uas uat uau uba ubb ubc ubi ubn ubr ubs ubt ubu uca ucb ucc uci ucn ucr ucs uct ucu uia uib uic uii uin uir uis uit uiu un- una unb unc uni unn unr uns unt unu ur- ura urb urc uri urn urr urs urt uru usa usb usc usi usn usr uss ust usu uta utb utc uti utn utr uts utt utu uua uuc uun uur uus uut uuu