-ic a-a a-b a-c a-i aaa aab aac aai aau aay ab- aba abb abc abi abu aby ac- aca acb acc aci acu acy ai- aia aib aic aii aiu aiy au- aua aub auc aui ay- aya ayc ayi ayu b-u baa bab bac bai bau bay bba bbb bbc bbi bbu bby bca bcb bcc bci bcu bcy bi- bia bib bic bii biu biy bua bub buc bui buu buy by- bya byc byi byu c-- caa cab cac cai cau cay cba cbb cbc cbi cbu cby cca ccb ccc cci ccu ci- cia cib cic cii ciu cua cub cuc cui cuu cuy cya cyb cyc ia- iaa iab iac iai iau iba ibb ibc ibi ibu iby ica icb icc ici icu icy iia iib iic iii iiu iu- iua iub iuc iui iya iyc iyy ua- uaa uab uac uai uau uay uba ubb ubc ubi ubu uby uca ucb ucc uci ucu uia uib uic uii uiu uua uuc uuu uyc uyi uyu yaa yab yac yai yau yay ybc ybi yby yca ycc yci ycu ycy yii yua yui yuu yuy yyb yyc yyu yyy