a-a a-b a-i a-t aaa aab aai aan aao aar aas aat aau ab- aba abb abi abn abo abr abs abt abu ai- aia aib aii ain aio air ais ait aiu an- ana anb ani ann ano anr ans ant anu aoa aob aoi aon aoo aor aos aot aou ar- ara arb ari arn aro arr ars art aru as- asa asb asi asn aso asr ass ast asu at- ata atb ati atn ato atr ats att atu au- aua aub aui aun auo aur aus aut b-u baa bab bai ban bao bar bas bat bau bba bbb bbi bbn bbo bbr bbs bbt bbu bi- bia bib bii bin bio bir bis bit biu bna bnb bni bnn bno bnr bns bnt bnu boa bob boi bon boo bor bos bot bou bra brb bri brn bro brr brs brt bru bsa bsb bsi bsn bso bsr bss bst bsu bta btb bti btn bto btr bts btt btu bua bub bui bun buo bur bus but buu ia- iaa iab iai ian iao iar ias iat iau iba ibb ibi ibn ibo ibr ibs ibt ibu iia iib iii iin iio iir iis iit iiu in- ina inb ini inn ino inr ins int inu io- ioa iob ioi ion ioo ior ios iot iou ir- ira irb iri irn iro irr irs irt iru is- isa isb isi isn iso isr iss ist isu ita itb iti itn ito its itt itu iu- iua iub iui iur ius iut n-i naa nab nai nan nao nar nas nat nau nba nbb nbi nbn nbo nbr nbs nbt nbu nia nib nii nin nio nir nis nit niu nna nnb nni nnn nno nns nnt nnu no- noa nob noi non noo nor nos not nou nra nrb nri nrn nro nrr nrs nrt nru nsa nsb nsi nsn nso nsr nss nst nsu nta ntb nti ntn nto ntr nts ntt ntu nua nub nui nun nuo nur nus nut nuu o-i oaa oab oai oan oao oar oas oat oau ob- oba obb obi obn obo obr obs obt obu oia oib oii oin oio oir ois oit oiu on- ona onb oni onn ono onr ons ont onu oo- ooa oob ooi oon ooo oor oos oot or- ora orb ori orn oro orr ors ort oru os- osa osb osi osn oso osr oss ost osu ot- ota otb oti otn oto otr ots ott otu ou- oua oui oun ouo our ous out ra- raa rab rai ran rao rar ras rat rau rba rbb rbi rbn rbo rbr rbs rbt rbu ria rib rii rin rio rir ris rit rna rnb rni rnn rno rnr rns rnt rnu roa rob roi ron roo ror ros rot rou rra rrb rri rrn rrr rrs rrt rru rsa rsb rsi rsn rso rsr rss rst rsu rta rtb rti rtn rto rtr rts rtt rtu rua rub rui run ruo rur rus rut ruu saa sab sai san sao sar sas sat sau sba sbb sbi sbn sbo sbr sbs sbt sbu sia sib sii sin sio sir sis sit siu sna snb sni snn sno snr sns snt snu soa sob soi son soo sor sos sot sou sr- sra srb sri srn sro srr srs srt ss- ssa ssb ssi ssn sso ssr sss sst ssu sta stb sti stn sto str sts stt stu sua sub sui sun suo sur sus sut suu taa tab tai tan tao tar tas tat tau tba tbb tbi tbn tbo tbr tbs tbt tbu tia tib tii tin tio tir tis tit tiu tna tnb tni tnn tno tnr tns tnt to- toa tob toi ton too tor tos tot tou tra trb tri trn tro trr trs trt tru tsa tsb tsi tsn tso tsr tss tst tsu tta ttb tti ttn tto ttr tts ttt ttu tua tub tui tun tuo tur tus tut tuu ua- uaa uab uai uan uao uar uas uat uau uba ubb ubi ubn ubo ubr ubs ubt ubu uia uib uii uin uio uir uis uit uiu un- una unb uni unn uno unr uns unt unu uoa uob uon uoo uor uos uot ur- ura urb uri urn uro urr urs urt uru usa usb usi usn uso usr uss ust usu uta utb uti utn uto utr uts utt utu uua uun uur uus uut uuu