a-a a-b a-c aaa aab aac aad aah aas aau ab- aba abb abc abd abh abs abu ac- aca acb acc acd ach acs acu ad- ada adb adc add adh ads adu aha ahb ahc ahd ahh ahs ahu as- asa asb asc asd ash ass asu au- aua aub auc aud auh aus b-u baa bab bac bad bah bas bau bba bbb bbc bbd bbh bbs bbu bca bcb bcc bcd bch bcs bcu bda bdb bdc bdd bdh bds bdu bha bhb bhc bhd bhh bhs bhu bsa bsb bsc bsd bsh bss bsu bua bub buc bud buh bus buu c-- caa cab cac cad cah cas cau cba cbb cbc cbd cbh cbs cbu cca ccb ccc ccd cch ccs ccu cda cdb cdc cdd cdh cds cdu ch- cha chb chc chd chh chs chu csa csb csc csd csh css csu cua cub cuc cud cuh cus cuu daa dab dac dad dah das dau dba dbb dbc dbd dbh dbs dbu dca dcb dcc dcd dcs dcu dda ddb ddc ddd ddh dds ddu dh- dha dhb dhc dhd dhh dhs dhu dsa dsb dsc dsd dsh dss dsu dua dub duc dud duh dus haa hab hac had hah has hau hba hbb hbc hbd hbh hbs hbu hca hcb hcc hcd hch hcs hda hdb hdc hdd hdh hds hdu hha hhb hhc hhd hhh hhs hhu hsa hsb hsc hsd hsh hss hsu hua hub huc hud huh hus huu saa sab sac sad sah sas sau sba sbb sbc sbd sbh sbs sbu sca scb scc scd sch scs scu sda sdb sdc sdd sdh sds sdu sh- sha shb shc shd shh shs shu ss- ssa ssb ssc ssd ssh sss ssu sua sub suc sud suh sus suu ua- uaa uab uac uad uah uas uau uba ubb ubc ubh ubs ubu uca ucb ucc ucd uch ucs ucu uda udb udc udd uds udu uha uhb uhc uhd uhh uhs uhu usa usb usc usd ush uss usu uua uuc uus uuu