-er -ic b-p bbb bbc bbe bbh bbi bbn bbo bbp bbr bbs bcb bcc bce bch bci bcn bco bcp bcr bcs be- beb bec bee beh bei ben beo bep ber bes bhb bhc bhe bhh bhi bho bhp bhr bhs bi- bib bic bie bih bii bin bio bip bir bis bnb bnc bne bni bnn bno bnp bnr bns bob boc boe boh boi bon boo bop bor bos bpb bpc bpe bph bpi bpn bpo bpp bpr bps brb bre brh bri brn bro brp brr brs bsb bsc bse bsh bsi bsn bso bsp bsr bss c-- cbb cbc cbe cbh cbi cbn cbo cbp cbr cbs ccb ccc cce cch cci ccn cco ccp ccr ccs ce- ceb cec cee ceh cei cen ceo cep cer ces ch- chb chc che chh chi chn cho chp chr chs ci- cib cic cie cih cii cin cio cip cir cis cn- cnb cnc cne cnh cni cnn cno cnp cnr cns co- cob coc coe coh coi con coo cop cor cos cpb cpc cpe cph cpi cpn cpo cpp cpr cps crb crc cre crh cri crn cro crp crr crs csb csc cse csh csi csn cso csp csr css ebb ebc ebe ebh ebi ebn ebo ebp ebr ebs ec- ecb ecc ece ech eci ecn eco ecr ecs eeb eec eee een eeo eep eer ees ehb ehc ehe ehh ehi ehn eho ehp ehr ehs eib eic eie eii ein eio eip eir eis en- enb enc ene enh eni enn eno enp enr ens eo- eob eoc eoe eoh eoi eon eoo eop eor eos ep- epb epc epe eph epi epn epo epp epr eps erb erc ere erh eri ern ero erp err ers es- esb esc ese esh esi esn eso esp esr ess h-i hbb hbc hbe hbh hbi hbn hbo hbp hbr hbs hcb hcc hce hch hci hcn hco hcp hcr hcs he- heb hec hee heh hei hen heo hep her hes hhb hhc hhe hhh hhi hhn hho hhp hhr hhs hib hic hie hih hii hin hio hip hir his hnb hnc hne hnh hnn hno hns hob hoc hoe hoh hoi hon hoo hop hor hos hpb hpc hpe hph hpi hpn hpo hpp hpr hps hr- hrb hrc hre hrh hri hrn hro hrp hrr hrs hsb hsc hse hsh hsi hsn hsp hsr hss ibb ibc ibe ibh ibi ibn ibo ibp ibr ibs icb icc ice ich ici icn ico icp icr ics ie- iec iee iei ien iep ier ies ihb ihc ihe ihh ihi ihn iho ihp ihr ihs iib iic iie iih iii iin iio iip iir iis in- inb inc ine inh ini inn ino inp inr ins io- iob ioc ioe ioh 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 ish isi isn iso isp isr iss n-i nbb nbc nbe nbi nbn nbo nbp nbr nbs ncb ncc nce nch nci ncn nco ncp ncr ncs ne- neb nec nee neh nei nen neo nep ner nes nhb nhc nhe nhh nhi nhn nhp nhr nhs nib nic nie nih nii nin nio nip nir nis nnb nnc nne nnh nni nnn nno nnp nns no- nob noc noe noh noi non noo nop nor nos npb npc npe nph npi npn npo npp npr nps nrb nrc nre nri nrn nro nrp nrr nrs nsb nsc nse nsh nsi nsn nso nsp nsr nss o-i ob- obb obc obe obh obi obn obo obp obr obs oc- ocb occ och oci ocn oco ocp ocr ocs oeb oec oee oeh oei oen oeo oep oer oes ohc ohe ohh ohi ohn oho ohp ohr ohs oib oic oie oii oin oio oip oir ois on- onb onc one onh oni onn ono onp onr ons oo- oob ooc ooh ooi oon ooo oop oor oos op- opb opc ope oph opi opn opo opp opr ops or- orb orc ore orh ori orn oro orp orr ors os- osb osc ose osh osi osn oso osp osr oss p-p pbb pbc pbe pbi pbn pbo pbp pbr pbs pcb pcc pce pch pci pcn pco pcp pcr pcs peb pec pee peh pei pen peo pep per pes phb phc phe phi phn pho php phr phs pib pic pie pih pii pin pio pip pir pis pn- pnb pnc pne pnh pni pnn pno pnp pnr pns pob poc poe poh poi pon poo pop por pos ppb ppc ppe pph ppi ppn ppo ppp ppr pps prb prc pre prh pri prn pro prp prr prs ps- psb psc pse psh psi psn pso psp psr pss rbb rbc rbe rbh rbi rbn rbo rbp rbr rbs rcb rcc rce rch rci rcn rco rcp rcr rcs re- reb rec ree reh rei ren reo rep rer res rh- rhb rhc rhe rhh rhi rhn rho rhp rhr rhs rib ric rie rih rii rin rio rip rir ris rnb rnc rnh rni rnn rno rnp rnr rns rob roc roe roh roi ron roo rop ror ros rpb rpc rpe rph rpi rpn rpo rpp rpr rps rrb rrc rrh rri rrn rrp rrr rrs rsb rsc rse rsh rsi rsn rso rsp rsr rss sbb sbc sbe sbh sbi sbn sbo sbp sbr sbs scb scc sce sch sci scn sco scp scr scs se- seb sec see seh sei sen seo sep ser ses sh- shb shc she shh shi shn sho shp shr shs sib sic sie sih sii sin sio sip sir sis snb snc sne sni snn sno snp snr sns sob soc soe soh soi son soo sop sor sos spb spc spe sph spi spn spo spp spr sps sr- srb src sre srh sri srn sro