a-a a-b a-i aaa aab aae aag aai aau ab- aba abb abe abg abi abu aea aeb aee aeg aei aeu ag- aga agb age agg agi agu ai- aia aib aie aig aii aiu au- aua aub aue aug aui b-u baa bab bae bag bai bau bba bbb bbe bbg bbi bbu be- bea beb bee beg bei beu bga bgb bge bgg bgi bgu bi- bia bib bie big bii biu bua bub bue bug bui buu eaa eab eae eag eai eau eba ebb ebe ebg ebi ebu eea eeb eee eeg ega egb ege egg egi egu eia eib eie eig eii eiu eu- eua eub eue eug eui gaa gab gae gag gai gau gba gbe gbg gbi gbu ge- gea geb gee geg gei geu gga ggb ggg ggi ggu gia gib gie gig gii giu gu- gua gub gue gug gui guu ia- iaa iab iae iag iai iau iba ibb ibe ibg ibi ibu ie- iea iee ieg iei iga igb ige igg igi igu iia iib iie iii iiu iu- iua iub iue iug iui ua- uaa uab uae uag uai uau uba ubb ube ubg ubi ubu uea ueb uee ueg uei uga ugb uge ugg ugi ugu uia uib uie uig uii uiu uua uue uug uuu