-th a-a a-b a-c a-t aaa aab aac aah aao aas aat aau aay ab- aba abb abc abh abo abs abt abu aby ac- aca acb acc ach aco acs act acu acy aha ahb ahc ahh aho ahs aht ahu ahy aoa aob aoc aoh aoo aos aot aou as- asa asb asc ash aso ass ast asu asy at- ata atb atc ath ato ats att atu au- aua aub auc auh auo aus aut ay- aya ayc ayh ayo ays ayt ayu b-u baa bab bac bah bao bas bat bau bay bba bbb bbc bbh bbo bbs bbt bbu bby bca bcb bcc bch bco bcs bct bcu bcy bha bhb bhc bhh bho bhs bht bhu boa bob boc boh boo bos bot bou boy bsa bsb bsc bsh bso bss bst bsu bsy bta btb btc bth bto bts btt btu bty bua bub buc buh buo bus but buu buy by- bya byc byh byo bys byt byu c-- caa cab cac cah cao cas cat cau cay cba cbb cbc cbh cbo cbs cbt cbu cby cca ccb ccc cch cco ccs cct ccu ch- cha chb chc chh cho chs cht chu chy co- coa cob coc coh coo cos cot cou coy csa csb csc csh cso css cst csu csy cta ctb ctc cth cto cts ctt ctu cty cua cub cuc cuh cuo cus cut cuu cuy cya cyb cyc cyo cys cyt haa hab hac hah hao has hat hau hay hba hbb hbc hbh hbo hbs hbt hbu hby hca hcb hcc hch hco hcs hct hcy hha hhb hhc hhh hho hhs hht hhu hhy hoa hob hoc hoh hoo hos hot hou hoy hsa hsb hsc hsh hss hst hsu hsy hta htb htc hth hto hts htt hty hua hub huc huh huo hus hut huu huy hy- hya hyb hyc hyh hyo hys hyt hyy oaa oab oac oah oao oas oat oau ob- oba obb obc obh obo obs obt obu oby oc- oca ocb occ och oco ocs oct ocu oha ohc ohh oho ohs oht ohu oo- ooa oob ooc ooh ooo oos oot os- osa osb osc osh oso oss ost osu ot- ota otb otc oth oto ots ott otu ou- oua ouc ouh ouo ous out oya oyo oys saa sab sac sah sao sas sat sau say sba sbb sbc sbh sbo sbs sbt sbu sby sca scb scc sch sco scs sct scu sh- sha shb shc shh sho shs sht shu shy soa sob soc soh soo sos sot sou soy ss- ssa ssb ssc ssh sso sss sst ssu sta stb stc sth sto sts stt stu sty sua sub suc suh suo sus sut suu suy sy- sya syb syc syh sys syt syu taa tab tac tah tao tas tat tau tay tba tbb tbc tbh tbo tbs tbt tbu tca tcb tcc tch tco tcs tct tcu th- tha thb thc thh tho ths tht thu thy to- toa tob toc toh too tos tot tou toy tsa tsb tsc tsh tso tss tst tsu tsy tta ttb ttc tth tto tts ttt ttu tty tua tub tuc tuh tuo tus tut tuu tuy tya tyc tyo tys tyt ua- uaa uab uac uah uao uas uat uau uay uba ubb ubc ubh ubo ubs ubt ubu uby uca ucb ucc uch uco ucs uct ucu uha uhb uhc uhh uho uhs uht uhu uhy uoa uob uoc uoo uos uot usa usb usc ush uso uss ust usu uta utb utc uth uto uts utt utu uty uua uuc uus uut uuu uyc uyo uys uyu yaa yab yac yah yao yas yat yau yay ybc ybs yby yca ycc ych yco ycs ycu ycy yha yhc yhs yht yhu yob yoc yoo yos yot you yoy ysa ysb ysc yso yss yst ysu ysy yta ytc yth yto yts ytt ytu yua yuh yuo yus yut yuu yuy yyb yyc yys yyt yyu yyy