a-a a-b a-t aaa aab aad aak aar aas aat aau ab- aba abb abd abk abr abs abt abu ad- ada adb add adk adr ads adt adu aka akb akd akk akr aks aku ar- ara arb ard ark arr ars art aru as- asa asb asd ask asr ass ast asu at- ata atb atd atr ats att atu au- aua aub aud auk aur aus aut b-u baa bab bad bak bar bas bat bau bba bbb bbd bbk bbr bbs bbt bbu bda bdb bdd bdk bdr bds bdt bdu bka bkb bkk bkr bks bkt bra brb brd brk brr brs brt bru bsa bsb bsd bsk bsr bss bst bsu bta btb btd btk btr bts btt btu bua bub bud buk bur bus but buu daa dab dad dak dar das dat dau dba dbb dbd dbk dbr dbs dbt dbu dda ddb ddd ddk ddr dds ddt ddu dka dkb dkk dkr dks dkt dku dra drb drd drk drr drs drt dru dsa dsb dsd dsk dsr dss dst dsu dta dtb dtd dtk dtr dts dtt dtu dua dub dud duk dur dus dut k-t ka- kaa kab kad kak kar kas kat kau kba kbb kbd kbk kbr kbs kbu kda kdb kdk kdr kds kdt kdu kkb kkk kkr kks kkt kku kra krd krk krr krs krt kru ksa ksb ksd ksk ksr kss kst ksu kta ktb ktk ktr kts ktt ktu kub kud kuk kur kus kut kuu ra- raa rab rad rak rar ras rat rau rba rbb rbd rbk rbr rbs rbt rbu rda rdb rdd rdr rds rdt rdu rkb rkk rks rkt rku rra rrb rrd rrk rrr rrs rrt rru rsa rsb rsd rsk rsr rss rst rsu rta rtb rtd rtk rtr rts rtt rtu rua rub rud ruk rur rus rut ruu saa sab sad sak sar sas sat sau sba sbb sbd sbk sbr sbs sbt sbu sda sdb sdd sdk sdr sds sdt sdu sk- ska skb skd skk skr sks skt sku sr- sra srb srd srk srr srs srt ss- ssa ssb ssd ssk ssr sss sst ssu sta stb std stk str sts stt stu sua sub sud suk sur sus sut suu taa tab tad tak tar tas tat tau tba tbb tbd tbk tbr tbs tbt tbu tda tdb tdd tdk tdr tds tdt tdu tka tkb tkk tkr tks tkt tra trb trd trk trr trs trt tru tsa tsb tsd tsk tsr tss tst tsu tta ttb ttd ttk ttr tts ttt ttu tua tub tud tuk tur tus tut tuu ua- uaa uab uad uak uar uas uat uau uba ubb ubk ubr ubs ubt ubu uda udb udd udk udr uds udt udu uka ukb ukk ukr uku ur- ura urb urd urk urr urs urt uru usa usb usd usk usr uss ust usu uta utb utd utk utr uts utt utu uua uur uus uut uuu