b-p bbb bbc bbe bbn bbo bbp bbs bbt bcb bcc bce bcn bco bcp bcs bct be- beb bec bee ben beo bep bes bet bnb bnc bne bnn bno bnp bns bnt bob boc boe bon boo bop bos bot bpb bpc bpe bpn bpo bpp bps bpt bsb bsc bse bsn bso bsp bss bst btb btc bte btn bto btp bts btt c-- cbb cbc cbe cbn cbo cbp cbs cbt ccb ccc cce ccn cco ccp ccs cct ce- ceb cec cee cen ceo cep ces cet cn- cnb cnc cne cnn cno cnp cns cnt co- cob coc coe con coo cop cos cot cpb cpc cpe cpn cpo cpp cps cpt csb csc cse csn cso csp css cst ctb ctc cte ctn cto ctp cts ctt ebb ebc ebe ebn ebo ebp ebs ebt ec- ecb ecc ece ecn eco ecs ect eeb eec eee een eeo eep ees eet en- enb enc ene enn eno enp ens ent eo- eob eoc eoe eon eoo eop eos eot ep- epb epc epe epn epo epp eps ept es- esb esc ese esn eso esp ess est etb etc ete etn eto etp ets ett nbb nbc nbe nbn nbo nbp nbs nbt ncb ncc nce ncn nco ncp ncs nct ne- neb nec nee nen neo nep nes net nnb nnc nne nnn nno nnp nns nnt no- nob noc noe non noo nop nos not npb npc npe npn npo npp nps npt nsb nsc nse nsn nso nsp nss nst ntb ntc nte ntn nto ntp nts ntt ob- obb obc obe obn obo obp obs obt oc- ocb occ ocn oco ocp ocs oct oeb oec oee oen oeo oep oes oet on- onb onc one onn ono onp ons ont oo- oob ooc oon ooo oop oos oot op- opb opc ope opn opo opp ops opt os- osb osc ose osn oso osp oss ost ot- otb otc ote otn oto otp ots ott p-p pbb pbc pbe pbn pbo pbp pbs pbt pcb pcc pce pcn pco pcp pcs pct peb pec pee pen peo pep pes pet pn- pnb pnc pne pnn pno pnp pns pnt pob poc poe pon poo pop pos pot ppb ppc ppe ppn ppo ppp pps ppt ps- psb psc pse psn pso psp pss pst pt- ptb ptc pte ptn pto ptp pts ptt sbb sbc sbe sbn sbo sbp sbs sbt scb scc sce scn sco scp scs sct se- seb sec see sen seo sep ses set snb snc sne snn sno snp sns snt sob soc soe son soo sop sos sot spb spc spe spn spo spp sps spt ss- ssb ssc sse ssn sso ssp sss sst stb stc ste stn sto stp sts stt tbb tbc tbe tbn tbo tbp tbs tbt tcb tcc tce tcn tco tcp tcs tct te- teb tec tee ten teo tep tes tet tnb tnc tne tnn tno tnp tns tnt to- tob toc toe ton too top tos tot tpb tpc tpe tpn tpo tpp tps tpt tsb tsc tse tsn tso tsp tss tst ttb ttc tte ttn tto ttp tts ttt