b-p bbb bbe bbo bbp bbt be- beb bee beo bep bet bez bob boe boo bop bot boz bpb bpe bpo bpp bpt btb bte bto btp btt btz bze bzo bzp bzz ebb ebe ebo ebp ebt eeb eee eeo eep eet eo- eob eoe eoo eop eot ep- epb epe epo epp ept epz etb ete eto etp ett etz eze ezo ezz ob- obb obe obo obp obt oeb oee oeo oep oet oo- oob ooo oop oot op- opb ope opo opp opt ot- otb ote oto otp ott otz oze ozo ozt ozz p-p pbb pbe pbo pbp pbt pbz peb pee peo pep pet pez pob poe poo pop pot poz ppb ppe ppo ppp ppt ppz pt- ptb pte pto ptp ptt ptz pzp pzt tbb tbe tbo tbp tbt tbz te- teb tee teo tep tet tez to- tob toe too top tot toz tpb tpe tpo tpp tpt tpz ttb tte tto ttp ttt tze zbb zbt zeb zee zeo zep zet zez zo- zob zoe zoo zot zpe zpo zpp zpt zte zzt zzz