a-a a-b a-t aaa aab aak aan aar aas aat aau ab- aba abb abk abn abr abs abt abu aka akb akk akn akr aks aku an- ana anb ank ann anr ans ant anu ar- ara arb ark arn arr ars art aru as- asa asb ask asn asr ass ast asu at- ata atb atn atr ats att atu au- aua aub auk aun aur aus aut b-u baa bab bak ban bar bas bat bau bba bbb bbk bbn bbr bbs bbt bbu bka bkb bkk bkn bkr bks bkt bna bnb bnk bnn bnr bns bnt bnu bra brb brk brn brr brs brt bru bsa bsb bsk bsn bsr bss bst bsu bta btb btk btn btr bts btt btu bua bub buk bun bur bus but buu k-t ka- kaa kab kak kan kar kas kat kau kba kbb kbk kbn kbr kbs kbu kkb kkk kkn kkr kks kkt kku kn- kna knk knn knr knt knu kra krk krn krr krs krt kru ksa ksb ksk ksn ksr kss kst ksu kta ktb ktk ktn ktr kts ktt ktu kub kuk kun kur kus kut kuu naa nab nak nan nar nas nat nau nba nbb nbk nbn nbr nbs nbt nbu nka nkk nkn nkr nks nkt nku nna nnb nnk nnn nns nnt nnu nra nrb nrk nrn nrr nrs nrt nru nsa nsb nsk nsn nsr nss nst nsu nta ntb ntk ntn ntr nts ntt ntu nua nub nuk nun nur nus nut nuu ra- raa rab rak ran rar ras rat rau rba rbb rbk rbn rbr rbs rbt rbu rkb rkk rks rkt rku rna rnb rnn rnr rns rnt rnu rra rrb rrk rrn rrr rrs rrt rru rsa rsb rsk rsn rsr rss rst rsu rta rtb rtk rtn rtr rts rtt rtu rua rub ruk run rur rus rut ruu saa sab sak san sar sas sat sau sba sbb sbk sbn sbr sbs sbt sbu sk- ska skb skk skr sks skt sku sna snb snk snn snr sns snt snu sr- sra srb srk srn srr srs srt ss- ssa ssb ssk ssn ssr sss sst ssu sta stb stk stn str sts stt stu sua sub suk sun sur sus sut suu taa tab tak tan tar tas tat tau tba tbb tbk tbn tbr tbs tbt tbu tka tkb tkk tkr tks tkt tna tnb tnk tnn tnr tns tnt tra trb trk trn trr trs trt tru tsa tsb tsk tsn tsr tss tst tsu tta ttb ttk ttn ttr tts ttt ttu tua tub tuk tun tur tus tut tuu ua- uaa uab uak uan uar uas uat uau uba ubb ubk ubn ubr ubs ubt ubu uka ukb ukk ukn ukr uku un- una unb unk unn unr uns unt unu ur- ura urb urk urn urr urs urt uru usa usb usk usn usr uss ust usu uta utb utk utn utr uts utt utu uua uun uur uus uut uuu