a-a a-b a-i aaa aab aad aai aau ab- aba abb abd abi abu ad- ada adb add adi adu ai- aia aib aid aii aiu au- aua aub aud aui b-u baa bab bad bai bau bba bbb bbd bbi bbu bda bdb bdd bdi bdu bi- bia bib bid bii biu bua bub bud bui buu daa dab dad dai dau dba dbb dbd dbi dbu dda ddb ddd ddi ddu di- dia dib did dii diu dua dub dud dui i-d ia- iaa iab iad iai iau iba ibb ibd ibi ibu ida idb idd idi idu iia iib iid iii iiu iu- iua iub iud iui ua- uaa uab uad uai uau uba ubb ubi ubu uda udb udd udi udu uia uib uid uii uiu uua uuu