-er -ic b-p bbb bbc bbe bbi bbn bbo bbp bbr bbs bbt bcb bcc bce bci bcn bco bcp bcr bcs bct be- beb bec bee bei ben beo bep ber bes bet bi- bib bic bie bii bin bio bip bir bis bit bnb bnc bne bni bnn bno bnp bnr bns bnt bob boc boe boi bon boo bop bor bos bot bpb bpc bpe bpi bpn bpo bpp bpr bps bpt brb bre bri brn bro brp brr brs brt bsb bsc bse bsi bsn bso bsp bsr bss bst btb btc bte bti btn bto btp btr bts btt c-- cbb cbc cbe cbi cbn cbo cbp cbr cbs cbt ccb ccc cce cci ccn cco ccp ccr ccs cct ce- ceb cec cee cei cen ceo cep cer ces cet ci- cib cic cie cii cin cio cip cir cis cit cn- cnb cnc cne cni cnn cno cnp cnr cns cnt co- cob coc coe coi con coo cop cor cos cot cpb cpc cpe cpi cpn cpo cpp cpr cps cpt crb crc cre cri crn cro crp crr crs crt csb csc cse csi csn cso csp csr css cst ctb ctc cte cti ctn cto ctp ctr cts ctt ebb ebc ebe ebi ebn ebo ebp ebr ebs ebt ec- ecb ecc ece eci ecn eco ecr ecs ect eeb eec eee een eeo eep eer ees eet eib eic eie eii ein eio eip eir eis eit en- enb enc ene eni enn eno enp enr ens ent eo- eob eoc eoe eoi eon eoo eop eor eos eot ep- epb epc epe epi epn epo epp epr eps ept erb erc ere eri ern ero erp err ers ert es- esb esc ese esi esn eso esp esr ess est etb etc ete eti etn eto etp etr ets ett ibb ibc ibe ibi ibn ibo ibp ibr ibs ibt icb icc ice ici icn ico icp icr ics ict ie- iec iee iei ien iep ier ies iet iib iic iie iii iin iio iip iir iis iit in- inb inc ine ini inn ino inp inr ins int io- iob ioc ioe ioi ion ioo iop ior ios iot ipb ipc ipe ipi ipn ipo ipp ipr ips ipt ir- irb irc ire iri irn iro irp irr irs irt is- isb isc ise isi isn iso isp isr iss ist itb itc ite iti itn ito itp its itt n-i nbb nbc nbe nbi nbn nbo nbp nbr nbs nbt ncb ncc nce nci ncn nco ncp ncr ncs nct ne- neb nec nee nei nen neo nep ner nes net nib nic nie nii nin nio nip nir nis nit nnb nnc nne nni nnn nno nnp nns nnt no- nob noc noe noi non noo nop nor nos not npb npc npe npi npn npo npp npr nps npt nrb nrc nre nri nrn nro nrp nrr nrs nrt nsb nsc nse nsi nsn nso nsp nsr nss nst ntb ntc nte nti ntn nto ntp ntr nts ntt o-i ob- obb obc obe obi obn obo obp obr obs obt oc- ocb occ oci ocn oco ocp ocr ocs oct oeb oec oee oei oen oeo oep oer oes oet oib oic oie oii oin oio oip oir ois oit on- onb onc one oni onn ono onp onr ons ont oo- oob ooc ooi oon ooo oop oor oos oot op- opb opc ope opi opn opo opp opr ops opt or- orb orc ore ori orn oro orp orr ors ort os- osb osc ose osi osn oso osp osr oss ost ot- otb otc ote oti otn oto otp otr ots ott p-p pbb pbc pbe pbi pbn pbo pbp pbr pbs pbt pcb pcc pce pci pcn pco pcp pcr pcs pct peb pec pee pei pen peo pep per pes pet pib pic pie pii pin pio pip pir pis pit pn- pnb pnc pne pni pnn pno pnp pnr pns pnt pob poc poe poi pon poo pop por pos pot ppb ppc ppe ppi ppn ppo ppp ppr pps ppt prb prc pre pri prn pro prp prr prs prt ps- psb psc pse psi psn pso psp psr pss pst pt- ptb ptc pte pti ptn pto ptp ptr pts ptt rbb rbc rbe rbi rbn rbo rbp rbr rbs rbt rcb rcc rce rci rcn rco rcp rcr rcs rct re- reb rec ree rei ren reo rep rer res ret rib ric rie rii rin rio rip rir ris rit rnb rnc rni rnn rno rnp rnr rns rnt rob roc roe roi ron roo rop ror ros rot rpb rpc rpe rpi rpn rpo rpp rpr rps rpt rrb rrc rri rrn rrp rrr rrs rrt rsb rsc rse rsi rsn rso rsp rsr rss rst rtb rtc rte rti rtn rto rtp rtr rts rtt sbb sbc sbe sbi sbn sbo sbp sbr sbs sbt scb scc sce sci scn sco scp scr scs sct se- seb sec see sei sen seo sep ser ses set sib sic sie sii sin sio sip sir sis sit snb snc sne sni snn sno snp snr sns snt sob soc soe soi son soo sop sor sos sot spb spc spe spi spn spo spp spr sps spt sr- srb src sre sri srn sro srp srr srs srt ss- ssb ssc sse ssi ssn sso ssp ssr sss sst stb stc ste sti stn sto stp str sts stt tbb tbc tbe tbi tbn tbo tbp tbr tbs tbt tcb tcc tce tci tcn tco tcp tcr tcs tct te- teb tec tee tei ten teo tep ter tes tet tib tic tie tii tin tio tip tir tis tit tnb tnc tne tni tnn tno tnp tnr tns tnt to- tob toc toe toi ton too top tor tos tot tpb tpc tpe tpi tpn tpo tpp tpr tps tpt