b-p bbb bbd bbe bbi bbp bbt bdb bdd bde bdi bdp bdt be- beb bed bee bei bep bet bi- bib bid bie bii bip bit bpb bpd bpe bpi bpp bpt btb btd bte bti btp btt dbb dbd dbe dbi dbp dbt ddb ddd dde ddi ddp ddt de- deb ded dee dei dep det di- dib did die dii dip dit dpb dpd dpe dpi dpp dpt dtb dtd dte dti dtp dtt ebb ebd ebe ebi ebp ebt ed- edb edd ede edi edp edt eeb eed eee eep eet eib eid eie eii eip eit ep- epb epd epe epi epp ept etb etd ete eti etp ett i-d ibb ibd ibe ibi ibp ibt idb idd ide idi idp idt ie- ied iee iei iep iet iib iid iie iii iip iit ipb ipd ipe ipi ipp ipt itb itd ite iti itp itt p-p pbb pbd pbe pbi pbp pbt pdb pdd pde pdi pdp pdt peb ped pee pei pep pet pib pid pie pii pip pit ppb ppd ppe ppi ppp ppt pt- ptb ptd pte pti ptp ptt tbb tbd tbe tbi tbp tbt tdb tdd tde tdi tdp tdt te- teb ted tee tei tep tet tib tid tie tii tip tit tpb tpd tpe tpi tpp tpt ttb ttd tte tti ttp ttt