b-p bbb bbc bbe bbk bbm bbo bbp bbt bcb bcc bce bck bcm bco bcp bct be- beb bec bee bek bem beo bep bet bkb bkc bke bkk bkm bko bkp bkt bmb bmc bme bmk bmm bmo bmp bmt bob boc boe bok bom boo bop bot bpb bpc bpe bpm bpo bpp bpt btb btc bte btk btm bto btp btt c-- cbb cbc cbe cbk cbm cbo cbp cbt ccb ccc cce cck ccm cco ccp cct ce- ceb cec cee cek cem ceo cep cet ckb ckc ckm cko ckt cmb cmc cme cmk cmm cmo cmp cmt co- cob coc coe cok com coo cop cot cpb cpc cpe cpk cpm cpo cpp cpt ctb ctc cte ctk ctm cto ctp ctt ebb ebc ebe ebk ebm ebo ebp ebt ec- ecb ecc ece eck ecm eco ect eeb eec eee eek eem eeo eep eet ekb ekc eke eko ekp ekt em- emb emc eme emk emm emo emp emt eo- eob eoc eoe eok eom eoo eop eot ep- epb epc epe epm epo epp ept etb etc ete etk etm eto etp ett k-t kbb kbc kbe kbk kbm kbo kbp kcb kcc kce kck kcm kcp kct ke- keb kec kee kek kem keo kep ket kkb kkc kke kkk kkm kkp kkt kmb kmc kme kmk kmm kmo kmp kmt kob koc koe kok kom koo kop kot kpc kpe kpk kpm kpo kpp kpt ktb ktc kte ktk ktm kto ktp ktt m-o mbb mbc mbe mbk mbm mbo mbp mbt mc- mcb mcc mce mck mcm mco mcp mct meb mec mee mek mem meo mep met mkb mkc mke mkk mkm mko mkp mkt mmb mmc mme mmk mmm mmo mmp mmt mob moc moe mok mom moo mop mot mpb mpc mpe mpk mpm mpo mpp mpt mtb mtc mte mtk mtm mto mtp mtt ob- obb obc obe obk obm obo obp obt oc- ocb occ ock ocm oco ocp oct oeb oec oee oem oeo oep oet okb okc oke okk oko okp om- omb omc ome omm omo omp omt oo- oob ooc ook oom ooo oop oot op- opb opc ope opk opm opo opp opt ot- otb otc ote otk otm oto otp ott p-p pbb pbc pbe pbk pbm pbo pbp pbt pcb pcc pce pck pcm pco pcp pct peb pec pee pek pem peo pep pet pkb pkc pke pkm pko pkp pkt pmb pmc pme pmk pmm pmo pmp pmt pob poc poe pok pom poo pop pot ppb ppc ppe ppk ppm ppo ppp ppt pt- ptb ptc pte ptk ptm pto ptp ptt tbb tbc tbe tbk tbm tbo tbp tbt tcb tcc tce tck tcm tco tcp tct te- teb tec tee tek tem teo tep tet tkb tkc tke tkk tkm tko tkp tkt tmb tmc tme tmk tmm tmo tmp tmt to- tob toc toe tok tom too top tot tpb tpc tpe tpk tpm tpo tpp tpt ttb ttc tte ttk ttm tto ttp ttt