-er -ic b-p bbb bbc bbe bbi bbn bbo bbp bbr bbs bcb bcc bce bci bcn bco bcp bcr bcs be- beb bec bee bei ben beo bep ber bes bi- bib bic bie bii bin bio bip bir bis bnb bnc bne bni bnn bno bnp bnr bns bob boc boe boi bon boo bop bor bos bpb bpc bpe bpi bpn bpo bpp bpr bps brb bre bri brn bro brp brr brs bsb bsc bse bsi bsn bso bsp bsr bss c-- cbb cbc cbe cbi cbn cbo cbp cbr cbs ccb ccc cce cci ccn cco ccp ccr ccs ce- ceb cec cee cei cen ceo cep cer ces ci- cib cic cie cii cin cio cip cir cis cn- cnb cnc cne cni cnn cno cnp cnr cns co- cob coc coe coi con coo cop cor cos cpb cpc cpe cpi cpn cpo cpp cpr cps crb crc cre cri crn cro crp crr crs csb csc cse csi csn cso csp csr css ebb ebc ebe ebi ebn ebo ebp ebr ebs ec- ecb ecc ece eci ecn eco ecr ecs eeb eec eee een eeo eep eer ees eib eic eie eii ein eio eip eir eis en- enb enc ene eni enn eno enp enr ens eo- eob eoc eoe eoi eon eoo eop eor eos ep- epb epc epe epi epn epo epp epr eps erb erc ere eri ern ero erp err ers es- esb esc ese esi esn eso esp esr ess ibb ibc ibe ibi ibn ibo ibp ibr ibs icb icc ice ici icn ico icp icr ics ie- iec iee iei ien iep ier ies iib iic iie iii iin iio iip iir iis in- inb inc ine ini inn ino inp inr ins io- iob ioc ioe ioi ion ioo iop ior ios ipb ipc ipe ipi ipn ipo ipp ipr ips ir- irb irc ire iri irn iro irp irr irs is- isb isc ise isi isn iso isp isr iss n-i nbb nbc nbe nbi nbn nbo nbp nbr nbs ncb ncc nce nci ncn nco ncp ncr ncs ne- neb nec nee nei nen neo nep ner nes nib nic nie nii nin nio nip nir nis nnb nnc nne nni nnn nno nnp nns no- nob noc noe noi non noo nop nor nos npb npc npe npi npn npo npp npr nps nrb nrc nre nri nrn nro nrp nrr nrs nsb nsc nse nsi nsn nso nsp nsr nss o-i ob- obb obc obe obi obn obo obp obr obs oc- ocb occ oci ocn oco ocp ocr ocs oeb oec oee oei oen oeo oep oer oes oib oic oie oii oin oio oip oir ois on- onb onc one oni onn ono onp onr ons oo- oob ooc ooi oon ooo oop oor oos op- opb opc ope opi opn opo opp opr ops or- orb orc ore ori orn oro orp orr ors os- osb osc ose osi osn oso osp osr oss p-p pbb pbc pbe pbi pbn pbo pbp pbr pbs pcb pcc pce pci pcn pco pcp pcr pcs peb pec pee pei pen peo pep per pes pib pic pie pii pin pio pip pir pis pn- pnb pnc pne pni pnn pno pnp pnr pns pob poc poe poi pon poo pop por pos ppb ppc ppe ppi ppn ppo ppp ppr pps prb prc pre pri prn pro prp prr prs ps- psb psc pse psi psn pso psp psr pss rbb rbc rbe rbi rbn rbo rbp rbr rbs rcb rcc rce rci rcn rco rcp rcr rcs re- reb rec ree rei ren reo rep rer res rib ric rie rii rin rio rip rir ris rnb rnc rni rnn rno rnp rnr rns rob roc roe roi ron roo rop ror ros rpb rpc rpe rpi rpn rpo rpp rpr rps rrb rrc rri rrn rrp rrr rrs rsb rsc rse rsi rsn rso rsp rsr rss sbb sbc sbe sbi sbn sbo sbp sbr sbs scb scc sce sci scn sco scp scr scs se- seb sec see sei sen seo sep ser ses sib sic sie sii sin sio sip sir sis snb snc sne sni snn sno snp snr sns sob soc soe soi son soo sop sor sos spb spc spe spi spn spo spp spr sps sr- srb src sre sri srn sro srp srr srs ss- ssb ssc sse ssi ssn sso ssp ssr sss