a-a a-b aaa aab aad aah aas aau ab- aba abb abd abh abs abu ad- ada adb add adh ads adu aha ahb ahd ahh ahs ahu as- asa asb asd ash ass asu au- aua aub aud auh aus b-u baa bab bad bah bas bau bba bbb bbd bbh bbs bbu bda bdb bdd bdh bds bdu bha bhb bhd bhh bhs bhu bsa bsb bsd bsh bss bsu bua bub bud buh bus buu daa dab dad dah das dau dba dbb dbd dbh dbs dbu dda ddb ddd ddh dds ddu dh- dha dhb dhd dhh dhs dhu dsa dsb dsd dsh dss dsu dua dub dud duh dus haa hab had hah has hau hba hbb hbd hbh hbs hbu hda hdb hdd hdh hds hdu hha hhb hhd hhh hhs hhu hsa hsb hsd hsh hss hsu hua hub hud huh hus huu saa sab sad sah sas sau sba sbb sbd sbh sbs sbu sda sdb sdd sdh sds sdu sh- sha shb shd shh shs shu ss- ssa ssb ssd ssh sss ssu sua sub sud suh sus suu ua- uaa uab uad uah uas uau uba ubb ubh ubs ubu uda udb udd uds udu uha uhb uhd uhh uhs uhu usa usb usd ush uss usu uua uus uuu