b-p bbb bbe bbk bbn bbo bbp bbs be- beb bee bek ben beo bep bes bkb bke bkk bkn bko bkp bks bnb bne bnk bnn bno bnp bns bob boe bok bon boo bop bos bpb bpe bpn bpo bpp bps bsb bse bsk bsn bso bsp bss ebb ebe ebk ebn ebo ebp ebs eeb eee eek een eeo eep ees ekb eke eko ekp eks en- enb ene enk enn eno enp ens eo- eob eoe eok eon eoo eop eos ep- epb epe epn epo epp eps es- esb ese esk esn eso esp ess kbb kbe kbk kbn kbo kbp kbs ke- keb kee kek ken keo kep kes kkb kke kkk kkn kkp kks kn- kne knk knn kno knp kob koe kok kon koo kop kos kpe kpk kpn kpo kpp kps ksb kse ksk ksn kso ksp kss nbb nbe nbk nbn nbo nbp nbs ne- neb nee nek nen neo nep nes nke nkk nkn nko nkp nks nnb nne nnk nnn nno nnp nns no- nob noe nok non noo nop nos npb npe npn npo npp nps nsb nse nsk nsn nso nsp nss ob- obb obe obk obn obo obp obs oeb oee oen oeo oep oes okb oke okk oko okp oks on- onb one onk onn ono onp ons oo- oob ook oon ooo oop oos op- opb ope opk opn opo opp ops os- osb ose osk osn oso osp oss p-p pbb pbe pbk pbn pbo pbp pbs peb pee pek pen peo pep pes pkb pke pkn pko pkp pks pn- pnb pne pnk pnn pno pnp pns pob poe pok pon poo pop pos ppb ppe ppk ppn ppo ppp pps ps- psb pse psk psn pso psp pss sbb sbe sbk sbn sbo sbp sbs se- seb see sek sen seo sep ses sk- skb ske skk sko skp sks snb sne snk snn sno snp sns sob soe sok son soo sop sos spb spe spk spn spo spp sps ss- ssb sse ssk ssn sso ssp sss