b-p bbb bbd bbi bbk bbn bbo bbp bbr bdb bdd bdi bdk bdo bdp bdr bi- bib bid bii bik bin bio bip bir bkb bkk bkn bko bkp bkr bnb bnd bni bnk bnn bno bnp bnr bob bod boi bok bon boo bop bor bpb bpd bpi bpn bpo bpp bpr brb brd bri brk brn bro brp brr dbb dbd dbi dbk dbn dbo dbp dbr ddb ddd ddi ddk ddn ddo ddp ddr di- dib did dii dik din dio dip dir dkb dki dkk dko dkp dkr dnb dnd dni dnk dnn dno dnp dnr dob dod doi dok don doo dop dor dpb dpd dpi dpk dpn dpo dpp dpr drb drd dri drk drn dro drp drr i-d ibb ibd ibi ibk ibn ibo ibp ibr idb idd idi idk idn ido idp idr iib iid iii iin iio iip iir ikb iki ikk iko ikr in- inb ind ini ink inn ino inp inr io- iob iod ioi ion ioo iop ior ipb ipd ipi ipn ipo ipp ipr ir- irb ird iri irk irn iro irp irr kbb kbd kbi kbk kbn kbo kbp kbr kdb kdk kdo kdp kdr kib kid kii kik kin kio kip kir kkb kki kkk kkn kkp kkr kn- knd kni knk knn kno knp knr kob kod koi kok kon koo kop kor kpd kpi kpk kpn kpo kpp kpr krd kri krk krn kro krp krr n-i nbb nbd nbi nbk nbn nbo nbp nbr ndb ndd ndi ndk ndn ndo ndp ndr nib nid nii nik nin nio nip nir nki nkk nkn nko nkp nkr nnb nni nnk nnn nno nnp no- nob nod noi nok non noo nop nor npb npd npi npn npo npp npr nrb nrd nri nrk nrn nro nrp nrr o-i ob- obb obd obi obk obn obo obp obr odb odd odi odn odo odp odr oib oid oii oik oin oio oip oir okb okd oki okk oko okp okr on- onb ond oni onk onn ono onp onr oo- oob ood ooi ook oon ooo oop oor op- opb opd opi opk opn opo opp opr or- orb ord ori ork orn oro orp orr p-p pbb pbd pbi pbk pbn pbo pbp pbr pdb pdd pdi pdk pdn pdo pdp pdr pib pid pii pik pin pio pip pir pkb pkd pki pkn pko pkp pkr pn- pnb pnd pni pnk pnn pno pnp pnr pob pod poi pok pon poo pop por ppb ppd ppi ppk ppn ppo ppp ppr prb prd pri prk prn pro prp prr rbb rbd rbi rbk rbn rbo rbp rbr rdb rdd rdi rdn rdo rdp rdr rib rid rii rik rin rio rip rir rkb rkk rko rkp rnb rnd rni rnn rno rnp rnr rob rod roi rok ron roo rop ror rpb rpd rpi rpk rpn rpo rpp rpr rrb rrd rri rrk rrn rrp rrr