-ey a-a a-b a-c aaa aab aac aad aae aas aau aay ab- aba abb abc abd abe abs abu aby ac- aca acb acc acd ace acs acu acy ad- ada adb adc add ade ads adu ady aea aeb aec aed aee aes aeu aey as- asa asb asc asd ase ass asu asy au- aua aub auc aud aue aus ay- aya ayc ayd aye ays ayu b-u baa bab bac bad bae bas bau bay bba bbb bbc bbd bbe bbs bbu bby bca bcb bcc bcd bce bcs bcu bcy bda bdb bdc bdd bde bds bdu bdy be- bea beb bec bed bee bes beu bey bsa bsb bsc bsd bse bss bsu bsy bua bub buc bud bue bus buu buy by- bya byc byd bye bys byu c-- caa cab cac cad cae cas cau cay cba cbb cbc cbd cbe cbs cbu cby cca ccb ccc ccd cce ccs ccu cda cdb cdc cdd cde cds cdu cdy ce- cea ceb cec ced cee ces ceu cey csa csb csc csd cse css csu csy cua cub cuc cud cue cus cuu cuy cya cyb cyc cyd cye cys daa dab dac dad dae das dau day dba dbb dbc dbd dbe dbs dbu dby dca dcb dcc dcd dce dcs dcu dda ddb ddc ddd dde dds ddu ddy de- dea deb dec ded dee des deu dey dsa dsb dsc dsd dse dss dsu dsy dua dub duc dud due dus duy dy- dya dyb dyc dyd dye dys dyu dyy eaa eab eac ead eae eas eau eba ebb ebc ebd ebe ebs ebu eby ec- eca ecb ecc ecd ece ecs ecu ed- eda edb edc edd ede eds edu edy eea eeb eec eed eee ees eey es- esa esb esc esd ese ess esu esy eu- eua eub euc eud eue eus eya eyc eyd eye eys saa sab sac sad sae sas sau say sba sbb sbc sbd sbe sbs sbu sby sca scb scc scd sce scs scu sda sdb sdc sdd sde sds sdu sdy se- sea seb sec sed see ses seu sey ss- ssa ssb ssc ssd sse sss ssu sua sub suc sud sue sus suu suy sy- sya syb syc syd sye sys syu ua- uaa uab uac uad uae uas uau uay uba ubb ubc ube ubs ubu uby uca ucb ucc ucd uce ucs ucu uda udb udc udd ude uds udu uea ueb uec ued uee ues uey usa usb usc usd use uss usu uua uuc uue uus uuu uyc uys uyu yaa yab yac yad yae yas yau yay ybc ybe ybs yby yca ycc ycd yce ycs ycu ycy yda yde yds ydy yea yeb yec yed yee yes yey ysa ysb ysc yse yss ysu ysy yua yud yue yus yuu yuy yyb yyc yye yys yyu yyy