a-a a-b a-t aaa aab aad aao aas aat aau aay ab- aba abb abd abo abs abt abu aby ad- ada adb add ado ads adt adu ady aoa aob aod aoo aos aot aou as- asa asb asd aso ass ast asu asy at- ata atb atd ato ats att atu au- aua aub aud auo aus aut ay- aya ayd ayo ays ayt ayu b-u baa bab bad bao bas bat bau bay bba bbb bbd bbo bbs bbt bbu bby bda bdb bdd bdo bds bdt bdu bdy boa bob bod boo bos bot bou boy bsa bsb bsd bso bss bst bsu bsy bta btb btd bto bts btt btu bty bua bub bud buo bus but buu buy by- bya byd byo bys byt byu daa dab dad dao das dat dau day dba dbb dbd dbo dbs dbt dbu dby dda ddb ddd ddo dds ddt ddu ddy doa dob dod doo dos dot dou doy dsa dsb dsd dso dss dst dsu dsy dta dtb dtd dto dts dtt dtu dty dua dub dud duo dus dut duy dy- dya dyb dyd dyo dys dyu dyy oaa oab oad oao oas oat oau ob- oba obb obd obo obs obt obu oby oda odb odd odo ods odt odu oo- ooa oob ood ooo oos oot os- osa osb osd oso oss ost osu ot- ota otb otd oto ots ott otu ou- oua oud ouo ous out oya oyd oyo oys saa sab sad sao sas sat sau say sba sbb sbd sbo sbs sbt sbu sby sda sdb sdd sdo sds sdt sdu sdy soa sob sod soo sos sot sou soy ss- ssa ssb ssd sso sss sst ssu sta stb std sto sts stt stu sty sua sub sud suo sus sut suu suy sy- sya syb syd sys syt syu taa tab tad tao tas tat tau tay tba tbb tbd tbo tbs tbt tbu tda tdb tdd tdo tds tdt tdu tdy to- toa tob tod too tos tot tou toy tsa tsb tsd tso tss tst tsu tsy tta ttb ttd tto tts ttt ttu tty tua tub tud tuo tus tut tuu tuy tya tyd tyo tys tyt ua- uaa uab uad uao uas uat uau uay uba ubb ubo ubs ubt ubu uby uda udb udd udo uds udt udu uoa uob uod uoo uos uot usa usb usd uso uss ust usu uta utb utd uto uts utt utu uty uua uus uut uuu uyo uys uyu yaa yab yad yao yas yat yau yay ybs yby yda ydo yds ydt ydy yob yod yoo yos yot you yoy ysa ysb yso yss yst ysu ysy yta ytd yto yts ytt ytu yua yud yuo yus yut yuu yuy yyb yys yyt yyu yyy