a-a a-b a-c aaa aab aac aah aao aar aas aau aay ab- aba abb abc abh abo abr abs abu aby ac- aca acb acc ach aco acr acs acu acy aha ahb ahc ahh aho ahr ahs ahu ahy aoa aob aoc aoh aoo aor aos aou ar- ara arb arc arh aro arr ars aru ary as- asa asb asc ash aso asr ass asu asy au- aua aub auc auh auo aur aus ay- aya ayc ayh ayo ayr ays ayu b-u baa bab bac bah bao bar bas bau bay bba bbb bbc bbh bbo bbr bbs bbu bby bca bcb bcc bch bco bcr bcs bcu bcy bha bhb bhc bhh bho bhr bhs bhu boa bob boc boh boo bor bos bou boy bra brb brh bro brr brs bru bry bsa bsb bsc bsh bso bsr bss bsu bsy bua bub buc buh buo bur bus buu buy by- bya byc byh byo byr bys byu c-- caa cab cac cah cao car cas cau cay cba cbb cbc cbh cbo cbr cbs cbu cby cca ccb ccc cch cco ccr ccs ccu ch- cha chb chc chh cho chr chs chu chy co- coa cob coc coh coo cor cos cou coy cra crb crc crh cro crr crs cru cry csa csb csc csh cso csr css csu csy cua cub cuc cuh cuo cur cus cuu cuy cya cyb cyc cyo cyr cys haa hab hac hah hao har has hau hay hba hbb hbc hbh hbo hbr hbs hbu hby hca hcb hcc hch hco hcr hcs hcy hha hhb hhc hhh hho hhr hhs hhu hhy hoa hob hoc hoh hoo hor hos hou hoy hr- hra hrb hrc hrh hro hrr hrs hru hsa hsb hsc hsh hsr hss hsu hsy hua hub huc huh huo hur hus huu huy hy- hya hyb hyc hyh hyo hyr hys hyy oaa oab oac oah oao oar oas oau ob- oba obb obc obh obo obr obs obu oby oc- oca ocb occ och oco ocr ocs ocu oha ohc ohh oho ohr ohs ohu oo- ooa oob ooc ooh ooo oor oos or- ora orb orc orh oro orr ors oru ory os- osa osb osc osh oso osr oss osu ou- oua ouc ouh ouo our ous oya oyo oys ra- raa rab rac rah rao rar ras rau ray rba rbb rbc rbh rbo rbr rbs rbu rca rcb rcc rch rco rcr rcs rcu rh- rha rhb rhc rhh rho rhr rhs rhu roa rob roc roh roo ror ros rou roy rra rrb rrc rrh rrr rrs rru rsa rsb rsc rsh rso rsr rss rsu rua rub ruc ruh ruo rur rus ruu ruy ry- rya ryc ryo ryr rys ryu ryy saa sab sac sah sao sar sas sau say sba sbb sbc sbh sbo sbr sbs sbu sby sca scb scc sch sco scr scs scu sh- sha shb shc shh sho shr shs shu shy soa sob soc soh soo sor sos sou soy sr- sra srb src srh sro srr srs sry ss- ssa ssb ssc ssh sso ssr sss ssu sua sub suc suh suo sur sus suu suy sy- sya syb syc syh syr sys syu ua- uaa uab uac uah uao uar uas uau uay uba ubb ubc ubh ubo ubr ubs ubu uby uca ucb ucc uch uco ucr ucs ucu uha uhb uhc uhh uho uhr uhs uhu uhy uoa uob uoc uoo uor uos ur- ura urb urc uro urr urs uru ury usa usb usc ush uso usr uss usu uua uuc uur uus uuu uyc uyo uys uyu yaa yab yac yah yao yar yas yau yay ybc ybr ybs yby yca ycc ych yco ycs ycu ycy yha yhc yhs yhu yob yoc yoo yor yos you yoy yra yrc yro yrs yru ysa ysb ysc yso ysr yss ysu ysy yua yuh yuo yur yus yuu yuy yyb yyc yys yyu yyy