a-a a-b a-i aaa aab aad aai aas aau ab- aba abb abd abi abs abu ad- ada adb add adi ads adu ai- aia aib aid aii ais aiu as- asa asb asd asi ass asu au- aua aub aud aui aus b-u baa bab bad bai bas bau bba bbb bbd bbi bbs bbu bda bdb bdd bdi bds bdu bi- bia bib bid bii bis biu bsa bsb bsd bsi bss bsu bua bub bud bui bus buu daa dab dad dai das dau dba dbb dbd dbi dbs dbu dda ddb ddd ddi dds ddu di- dia dib did dii dis diu dsa dsb dsd dsi dss dsu dua dub dud dui dus i-d ia- iaa iab iad iai ias iau iba ibb ibd ibi ibs ibu ida idb idd idi ids idu iia iib iid iii iis iiu is- isa isb isd isi iss isu iu- iua iub iud iui ius saa sab sad sai sas sau sba sbb sbd sbi sbs sbu sda sdb sdd sdi sds sdu sia sib sid sii sis siu ss- ssa ssb ssd ssi sss ssu sua sub sud sui sus suu ua- uaa uab uad uai uas uau uba ubb ubi ubs ubu uda udb udd udi uds udu uia uib uid uii uis uiu usa usb usd usi uss usu uua uus uuu