b-p bbb bbe bbi bbo bbp bbt be- beb bee bei beo bep bet bi- bib bie bii bio bip bit bob boe boi boo bop bot bpb bpe bpi bpo bpp bpt btb bte bti bto btp btt ebb ebe ebi ebo ebp ebt eeb eee eeo eep eet eib eie eii eio eip eit eo- eob eoe eoi eoo eop eot ep- epb epe epi epo epp ept etb ete eti eto etp ett ibb ibe ibi ibo ibp ibt ie- iee iei iep iet iib iie iii iio iip iit io- iob ioe ioi ioo iop iot ipb ipe ipi ipo ipp ipt itb ite iti ito itp itt o-i ob- obb obe obi obo obp obt oeb oee oei oeo oep oet oib oie oii oio oip oit oo- oob ooi ooo oop oot op- opb ope opi opo opp opt ot- otb ote oti oto otp ott p-p pbb pbe pbi pbo pbp pbt peb pee pei peo pep pet pib pie pii pio pip pit pob poe poi poo pop pot ppb ppe ppi ppo ppp ppt pt- ptb pte pti pto ptp ptt tbb tbe tbi tbo tbp tbt te- teb tee tei teo tep tet tib tie tii tio tip tit to- tob toe toi too top tot tpb tpe tpi tpo tpp tpt ttb tte tti tto ttp ttt