a-a a-b a-i a-t aaa aab aai aan aar aas aat aau ab- aba abb abi abn abr abs abt abu ai- aia aib aii ain air ais ait aiu an- ana anb ani ann anr ans ant anu ar- ara arb ari arn arr ars art aru as- asa asb asi asn asr ass ast asu at- ata atb ati atn atr ats att atu au- aua aub aui aun aur aus aut b-u baa bab bai ban bar bas bat bau bba bbb bbi bbn bbr bbs bbt bbu bi- bia bib bii bin bir bis bit biu bna bnb bni bnn bnr bns bnt bnu bra brb bri brn brr brs brt bru bsa bsb bsi bsn bsr bss bst bsu bta btb bti btn btr bts btt btu bua bub bui bun bur bus but buu ia- iaa iab iai ian iar ias iat iau iba ibb ibi ibn ibr ibs ibt ibu iia iib iii iin iir iis iit iiu in- ina inb ini inn inr ins int inu ir- ira irb iri irn irr irs irt iru is- isa isb isi isn isr iss ist isu ita itb iti itn its itt itu iu- iua iub iui iur ius iut n-i naa nab nai nan nar nas nat nau nba nbb nbi nbn nbr nbs nbt nbu nia nib nii nin nir nis nit niu nna nnb nni nnn nns nnt nnu nra nrb nri nrn nrr nrs nrt nru nsa nsb nsi nsn nsr nss nst nsu nta ntb nti ntn ntr nts ntt ntu nua nub nui nun nur nus nut nuu ra- raa rab rai ran rar ras rat rau rba rbb rbi rbn rbr rbs rbt rbu ria rib rii rin rir ris rit rna rnb rni rnn rnr rns rnt rnu rra rrb rri rrn rrr rrs rrt rru rsa rsb rsi rsn rsr rss rst rsu rta rtb rti rtn rtr rts rtt rtu rua rub rui run rur rus rut ruu saa sab sai san sar sas sat sau sba sbb sbi sbn sbr sbs sbt sbu sia sib sii sin sir sis sit siu sna snb sni snn snr sns snt snu sr- sra srb sri srn srr srs srt ss- ssa ssb ssi ssn ssr sss sst ssu sta stb sti stn str sts stt stu sua sub sui sun sur sus sut suu taa tab tai tan tar tas tat tau tba tbb tbi tbn tbr tbs tbt tbu tia tib tii tin tir tis tit tiu tna tnb tni tnn tnr tns tnt tra trb tri trn trr trs trt tru tsa tsb tsi tsn tsr tss tst tsu tta ttb tti ttn ttr tts ttt ttu tua tub tui tun tur tus tut tuu ua- uaa uab uai uan uar uas uat uau uba ubb ubi ubn ubr ubs ubt ubu uia uib uii uin uir uis uit uiu un- una unb uni unn unr uns unt unu ur- ura urb uri urn urr urs urt uru usa usb usi usn usr uss ust usu uta utb uti utn utr uts utt utu uua uun uur uus uut uuu