a-a a-b a-i a-q a-t aaa aab aae aai aaq aat ab- aba abb abe abi abq abt aea aeb aee aei aeq aet ai- aia aib aie aii aiq ait aqa aqi aqt at- ata atb ate ati att baa bab bae bai baq bat bba bbb bbe bbi bbq bbt be- bea beb bee bei beq bet bi- bia bib bie bii bit bqe bqt bta btb bte bti btq btt eaa eab eae eai eat eba ebb ebe ebi ebq ebt eea eeb eee eet eia eib eie eii eit eqa eqe eqq eqt eta etb ete eti ett ia- iaa iab iae iai iaq iat iba ibb ibe ibi ibt ie- iea iee iei iet iia iib iie iii iit iqa iqe iqt ita itb ite iti itq itt qaa qat qba qbe qbq qee qet qie qit qqq qta qti qtq taa tab tae tai taq tat tba tbb tbe tbi tbt te- tea teb tee tei teq tet tia tib tie tii tit tta ttb tte tti ttt