a-a a-b a-c aaa aab aac aad aae aah aas aau ab- aba abb abc abd abe abh abs abu ac- aca acb acc acd ace ach acs acu ad- ada adb adc add ade adh ads adu aea aeb aec aed aee aeh aes aeu aha ahb ahc ahd ahe ahh ahs ahu as- asa asb asc asd ase ash ass asu au- aua aub auc aud aue auh aus b-u baa bab bac bad bae bah bas bau bba bbb bbc bbd bbe bbh bbs bbu bca bcb bcc bcd bce bch bcs bcu bda bdb bdc bdd bde bdh bds bdu be- bea beb bec bed bee beh bes beu bha bhb bhc bhd bhe bhh bhs bhu bsa bsb bsc bsd bse bsh bss bsu bua bub buc bud bue buh bus buu c-- caa cab cac cad cae cah cas cau cba cbb cbc cbd cbe cbh cbs cbu cca ccb ccc ccd cce cch ccs ccu cda cdb cdc cdd cde cdh cds cdu ce- cea ceb cec ced cee ceh ces ceu ch- cha chb chc chd che chh chs chu csa csb csc csd cse csh css csu cua cub cuc cud cue cuh cus cuu daa dab dac dad dae dah das dau dba dbb dbc dbd dbe dbh dbs dbu dca dcb dcc dcd dce dcs dcu dda ddb ddc ddd dde ddh dds ddu de- dea deb dec ded dee deh des deu dh- dha dhb dhc dhd dhe dhh dhs dhu dsa dsb dsc dsd dse dsh dss dsu dua dub duc dud due duh dus eaa eab eac ead eae eah eas eau eba ebb ebc ebd ebe ebh ebs ebu ec- eca ecb ecc ecd ece ech ecs ecu ed- eda edb edc edd ede edh eds edu eea eeb eec eed eee ees eha ehb ehc ehd ehe ehh ehs ehu es- esa esb esc esd ese esh ess esu eu- eua eub euc eud eue eus haa hab hac had hae hah has hau hba hbb hbc hbd hbe hbh hbs hbu hca hcb hcc hcd hce hch hcs hda hdb hdc hdd hde hdh hds hdu he- hea heb hec hed hee heh hes heu hha hhb hhc hhd hhe hhh hhs hhu hsa hsb hsc hsd hse hsh hss hsu hua hub huc hud hue huh hus huu saa sab sac sad sae sah sas sau sba sbb sbc sbd sbe sbh sbs sbu sca scb scc scd sce sch scs scu sda sdb sdc sdd sde sdh sds sdu se- sea seb sec sed see seh ses seu sh- sha shb shc shd she shh shs shu ss- ssa ssb ssc ssd sse ssh sss ssu sua sub suc sud sue suh sus suu ua- uaa uab uac uad uae uah uas uau uba ubb ubc ube ubh ubs ubu uca ucb ucc ucd uce uch ucs ucu uda udb udc udd ude uds udu uea ueb uec ued uee ueh ues uha uhb uhc uhd uhe uhh uhs uhu usa usb usc usd use ush uss usu uua uuc uue uus uuu