a-a a-b a-i a-t aaa aab aae aai aao aap aat ab- aba abb abe abi abo abp abt aea aeb aee aei aeo aep aet ai- aia aib aie aii aio aip ait aoa aob aoe aoi aoo aop aot ap- apa apb ape api apo app apt at- ata atb ate ati ato atp att b-p baa bab bae bai bao bap bat bba bbb bbe bbi bbo bbp bbt be- bea beb bee bei beo bep bet bi- bia bib bie bii bio bip bit boa bob boe boi boo bop bot bpa bpb bpe bpi bpo bpp bpt bta btb bte bti bto btp btt eaa eab eae eai eao eap eat eba ebb ebe ebi ebo ebp ebt eea eeb eee eeo eep eet eia eib eie eii eio eip eit eo- eoa eob eoe eoi eoo eop eot ep- epa epb epe epi epo epp ept eta etb ete eti eto etp ett ia- iaa iab iae iai iao iap iat iba ibb ibe ibi ibo ibp ibt ie- iea iee iei iep iet iia iib iie iii iio iip iit io- ioa iob ioe ioi ioo iop iot ipa ipb ipe ipi ipo ipp ipt ita itb ite iti ito itp itt o-i oaa oab oae oai oao oap oat ob- oba obb obe obi obo obp obt oea oeb oee oei oeo oep oet oia oib oie oii oio oip oit oo- ooa oob ooi ooo oop oot op- opa opb ope opi opo opp opt ot- ota otb ote oti oto otp ott p-p paa pab pae pai pao pap pat pba pbb pbe pbi pbo pbp pbt pea peb pee pei peo pep pet pia pib pie pii pio pip pit poa pob poe poi poo pop pot ppa ppb ppe ppi ppo ppp ppt pt- pta ptb pte pti pto ptp ptt taa tab tae tai tao tap tat tba tbb tbe tbi tbo tbp tbt te- tea teb tee tei teo tep tet tia tib tie tii tio tip tit to- toa tob toe toi too top tot tpa tpb tpe tpi tpo tpp tpt tta ttb tte tti tto ttp ttt