a-a a-b a-c aaa aab aac aah aar aas aau aay ab- aba abb abc abh abr abs abu aby ac- aca acb acc ach acr acs acu acy aha ahb ahc ahh ahr ahs ahu ahy ar- ara arb arc arh arr ars aru ary as- asa asb asc ash asr ass asu asy au- aua aub auc auh aur aus ay- aya ayc ayh ayr ays ayu b-u baa bab bac bah bar bas bau bay bba bbb bbc bbh bbr bbs bbu bby bca bcb bcc bch bcr bcs bcu bcy bha bhb bhc bhh bhr bhs bhu bra brb brh brr brs bru bry bsa bsb bsc bsh bsr bss bsu bsy bua bub buc buh bur bus buu buy by- bya byc byh byr bys byu c-- caa cab cac cah car cas cau cay cba cbb cbc cbh cbr cbs cbu cby cca ccb ccc cch ccr ccs ccu ch- cha chb chc chh chr chs chu chy cra crb crc crh crr crs cru cry csa csb csc csh csr css csu csy cua cub cuc cuh cur cus cuu cuy cya cyb cyc cyr cys haa hab hac hah har has hau hay hba hbb hbc hbh hbr hbs hbu hby hca hcb hcc hch hcr hcs hcy hha hhb hhc hhh hhr hhs hhu hhy hr- hra hrb hrc hrh hrr hrs hru hsa hsb hsc hsh hsr hss hsu hsy hua hub huc huh hur hus huu huy hy- hya hyb hyc hyh hyr hys hyy ra- raa rab rac rah rar ras rau ray rba rbb rbc rbh rbr rbs rbu rca rcb rcc rch rcr rcs rcu rh- rha rhb rhc rhh rhr rhs rhu rra rrb rrc rrh rrr rrs rru rsa rsb rsc rsh rsr rss rsu rua rub ruc ruh rur rus ruu ruy ry- rya ryc ryr rys ryu ryy saa sab sac sah sar sas sau say sba sbb sbc sbh sbr sbs sbu sby sca scb scc sch scr scs scu sh- sha shb shc shh shr shs shu shy sr- sra srb src srh srr srs sry ss- ssa ssb ssc ssh ssr sss ssu sua sub suc suh sur sus suu suy sy- sya syb syc syh syr sys syu ua- uaa uab uac uah uar uas uau uay uba ubb ubc ubh ubr ubs ubu uby uca ucb ucc uch ucr ucs ucu uha uhb uhc uhh uhr uhs uhu uhy ur- ura urb urc urr urs uru ury usa usb usc ush usr uss usu uua uuc uur uus uuu uyc uys uyu yaa yab yac yah yar yas yau yay ybc ybr ybs yby yca ycc ych ycs ycu ycy yha yhc yhs yhu yra yrc yrs yru ysa ysb ysc ysr yss ysu ysy yua yuh yur yus yuu yuy yyb yyc yys yyu yyy