a-a a-b a-c aaa aab aac aaj aar aas aau aay ab- aba abb abc abj abr abs abu aby ac- aca acb acc acj acr acs acu acy aja ajb ajc ajj ajr ajs aju ajy ar- ara arb arc arj arr ars aru ary as- asa asb asc asj asr ass asu asy au- aua aub auc auj aur aus ay- aya ayc ayr ays ayu b-u baa bab bac baj bar bas bau bay bba bbb bbc bbr bbs bbu bby bca bcb bcc bcj bcr bcs bcu bcy bja bjc bjj bjr bjs bju bra brb brj brr brs bru bry bsa bsb bsc bsj bsr bss bsu bsy bua bub buc buj bur bus buu buy by- bya byc byj byr bys byu c-- c-j caa cab cac caj car cas cau cay cba cbb cbc cbj cbr cbs cbu cby cca ccb ccc ccj ccr ccs ccu cja cjb cjc cjr cjs cra crb crc crj crr crs cru cry csa csb csc csj csr css csu csy cua cub cuc cur cus cuu cuy cya cyb cyc cyr cys jaa jab jac jaj jar jas jau jay jba jbc jbj jbr jbs jbu jca jcb jcc jcr jcs jcu jja jjb jjc jjj jjr jjs jju jjy jra jrb jrc jrr jrs jsa jsb jsc jsj jsr jss jsu jsy jub jur jus juy jyj jyr jys ra- raa rab rac raj rar ras rau ray rba rbb rbc rbr rbs rbu rca rcb rcc rcj rcr rcs rcu rja rjc rjr rra rrb rrc rrr rrs rru rsa rsb rsc rsj rsr rss rsu rua rub ruc rur rus ruu ruy ry- rya ryc ryr rys ryu ryy saa sab sac saj sar sas sau say sba sbb sbc sbj sbr sbs sbu sby sca scb scc scj scr scs scu sja sjb sjc sjj sjr sjs sju sr- sra srb src srj srr srs sry ss- ssa ssb ssc ssj ssr sss ssu sua sub suc sur sus suu suy sy- sya syb syc syr sys syu ua- uaa uab uac uaj uar uas uau uay uba ubb ubc ubr ubs ubu uby uca ucb ucc ucj ucr ucs ucu ujc ujs ur- ura urb urc urr urs uru ury usa usb usc usj usr uss usu uua uuc uur uus uuu uyc uys uyu yaa yab yac yar yas yau yay ybc ybr ybs yby yca ycc ycs ycu ycy yra yrc yrs yru ysa ysb ysc ysj ysr yss ysu ysy yua yuj yur yus yuu yuy yyb yyc yys yyu yyy