b-p bbb bbk bbn bbo bbp bbs bbt bkb bkk bkn bko bkp bks bkt bnb bnk bnn bno bnp bns bnt bob bok bon boo bop bos bot bpb bpn bpo bpp bps bpt bsb bsk bsn bso bsp bss bst btb btk btn bto btp bts btt k-t kbb kbk kbn kbo kbp kbs kkb kkk kkn kkp kks kkt kn- knk knn kno knp knt kob kok kon koo kop kos kot kpk kpn kpo kpp kps kpt ksb ksk ksn kso ksp kss kst ktb ktk ktn kto ktp kts ktt nbb nbk nbn nbo nbp nbs nbt nkk nkn nko nkp nks nkt nnb nnk nnn nno nnp nns nnt no- nob nok non noo nop nos not npb npn npo npp nps npt nsb nsk nsn nso nsp nss nst ntb ntk ntn nto ntp nts ntt ob- obb obk obn obo obp obs obt okb okk oko okp oks on- onb onk onn ono onp ons ont oo- oob ook oon ooo oop oos oot op- opb opk opn opo opp ops opt os- osb osk osn oso osp oss ost ot- otb otk otn oto otp ots ott p-p pbb pbk pbn pbo pbp pbs pbt pkb pkn pko pkp pks pkt pn- pnb pnk pnn pno pnp pns pnt pob pok pon poo pop pos pot ppb ppk ppn ppo ppp pps ppt ps- psb psk psn pso psp pss pst pt- ptb ptk ptn pto ptp pts ptt sbb sbk sbn sbo sbp sbs sbt sk- skb skk sko skp sks skt snb snk snn sno snp sns snt sob sok son soo sop sos sot spb spk spn spo spp sps spt ss- ssb ssk ssn sso ssp sss sst stb stk stn sto stp sts stt tbb tbk tbn tbo tbp tbs tbt tkb tkk tko tkp tks tkt tnb tnk tnn tno tnp tns tnt to- tob tok ton too top tos tot tpb tpk tpn tpo tpp tps tpt tsb tsk tsn tso tsp tss tst ttb ttk ttn tto ttp tts ttt