-ic a-a a-b a-c a-i aaa aab aac aag aai aau ab- aba abb abc abg abi abu ac- aca acb acc acg aci acu ag- aga agb agc agg agi agu ai- aia aib aic aig aii aiu au- aua aub auc aug aui b-u baa bab bac bag bai bau bba bbb bbc bbg bbi bbu bca bcb bcc bcg bci bcu bga bgb bgc bgg bgi bgu bi- bia bib bic big bii biu bua bub buc bug bui buu c-- caa cab cac cag cai cau cba cbb cbc cbg cbi cbu cca ccb ccc ccg cci ccu cga cgb cgc cgg cgi cgu ci- cia cib cic cig cii ciu cua cub cuc cug cui cuu gaa gab gac gag gai gau gba gbc gbg gbi gbu gca gcb gcc gcg gci gcu gga ggb ggc ggg ggi ggu gia gib gic gig gii giu gu- gua gub guc gug gui guu ia- iaa iab iac iag iai iau iba ibb ibc ibg ibi ibu ica icb icc icg ici icu iga igb igc igg igi igu iia iib iic iii iiu iu- iua iub iuc iug iui ua- uaa uab uac uag uai uau uba ubb ubc ubg ubi ubu uca ucb ucc ucg uci ucu uga ugb ugc ugg ugi ugu uia uib uic uig uii uiu uua uuc uug uuu