-ic a-a a-b a-c a-i aaa aab aac aad aai aau ab- aba abb abc abd abi abu ac- aca acb acc acd aci acu ad- ada adb adc add adi adu ai- aia aib aic aid aii aiu au- aua aub auc aud aui b-u baa bab bac bad bai bau bba bbb bbc bbd bbi bbu bca bcb bcc bcd bci bcu bda bdb bdc bdd bdi bdu bi- bia bib bic bid bii biu bua bub buc bud bui buu c-- caa cab cac cad cai cau cba cbb cbc cbd cbi cbu cca ccb ccc ccd cci ccu cda cdb cdc cdd cdi cdu ci- cia cib cic cid cii ciu cua cub cuc cud cui cuu daa dab dac dad dai dau dba dbb dbc dbd dbi dbu dca dcb dcc dcd dci dcu dda ddb ddc ddd ddi ddu di- dia dib dic did dii diu dua dub duc dud dui i-d ia- iaa iab iac iad iai iau iba ibb ibc ibd ibi ibu ica icb icc icd ici icu ida idb idc idd idi idu iia iib iic iid iii iiu iu- iua iub iuc iud iui ua- uaa uab uac uad uai uau uba ubb ubc ubi ubu uca ucb ucc ucd uci ucu uda udb udc udd udi udu uia uib uic uid uii uiu uua uuc uuu