b-p bbb bbd bbk bbn bbo bbp bbr bdb bdd bdk bdo bdp bdr bkb bkk bkn bko bkp bkr bnb bnd bnk bnn bno bnp bnr bob bod bok bon boo bop bor bpb bpd bpn bpo bpp bpr brb brd brk brn bro brp brr dbb dbd dbk dbn dbo dbp dbr ddb ddd ddk ddn ddo ddp ddr dkb dkk dko dkp dkr dnb dnd dnk dnn dno dnp dnr dob dod dok don doo dop dor dpb dpd dpk dpn dpo dpp dpr drb drd drk drn dro drp drr kbb kbd kbk kbn kbo kbp kbr kdb kdk kdo kdp kdr kkb kkk kkn kkp kkr kn- knd knk knn kno knp knr kob kod kok kon koo kop kor kpd kpk kpn kpo kpp kpr krd krk krn kro krp krr nbb nbd nbk nbn nbo nbp nbr ndb ndd ndk ndn ndo ndp ndr nkk nkn nko nkp nkr nnb nnk nnn nno nnp no- nob nod nok non noo nop nor npb npd npn npo npp npr nrb nrd nrk nrn nro nrp nrr ob- obb obd obk obn obo obp obr odb odd odn odo odp odr okb okd okk oko okp okr on- onb ond onk onn ono onp onr oo- oob ood ook oon ooo oop oor op- opb opd opk opn opo opp opr or- orb ord ork orn oro orp orr p-p pbb pbd pbk pbn pbo pbp pbr pdb pdd pdk pdn pdo pdp pdr pkb pkd pkn pko pkp pkr pn- pnb pnd pnk pnn pno pnp pnr pob pod pok pon poo pop por ppb ppd ppk ppn ppo ppp ppr prb prd prk prn pro prp prr rbb rbd rbk rbn rbo rbp rbr rdb rdd rdn rdo rdp rdr rkb rkk rko rkp rnb rnd rnn rno rnp rnr rob rod rok ron roo rop ror rpb rpd rpk rpn rpo rpp rpr rrb rrd rrk rrn rrp rrr