-er -ic c-- ccc cce ccf cch cci cco ccp ccr ccs ce- cec cee cef ceh cei ceo cep cer ces cfc cfe cff cfh cfi cfo cfp cfr cfs ch- chc che chf chh chi cho chp chr chs ci- cic cie cif cih cii cio cip cir cis co- coc coe cof coh coi coo cop cor cos cpc cpe cpf cph cpi cpo cpp cpr cps crc cre crf crh cri cro crp crr crs csc cse csf csh csi cso csp csr css ec- ecc ece ecf ech eci eco ecr ecs eec eee eef eeo eep eer ees ef- efc efe eff efh efi efo efp efr efs ehc ehe ehf ehh ehi eho ehp ehr ehs eic eie eif eii eio eip eir eis eo- eoc eoe eof eoh eoi eoo eop eor eos ep- epc epe epf eph epi epo epp epr eps erc ere erf erh eri ero erp err ers es- esc ese esf esh esi eso esp esr ess fcc fce fcf fci fco fcp fcr fcs fec fee fef feh fei feo fep fer fes ffc ffe fff ffh ffi ffo ffp ffr ffs fhc fhe fhf fhh fhi fho fhp fhr fhs fic fie fif fih fii fip fir fis foc foe fof foh foi foo fop for fos fpc fpe fph fpi fpo fpp fpr fps frc fre frf frh fri fro frp frr frs fsc fse fsf fsh fsi fso fsp fsr fss h-i hcc hce hcf hch hci hco hcp hcr hcs he- hec hee hef heh hei heo hep her hes hfc hfe hff hfh hfi hfo hfp hfr hfs hhc hhe hhf hhh hhi hho hhp hhr hhs hic hie hif hih hii hio hip hir his hoc hoe hof hoh hoi hoo hop hor hos hpc hpe hpf hph hpi hpo hpp hpr hps hr- hrc hre hrf hrh hri hro hrp hrr hrs hsc hse hsf hsh hsi hsp hsr hss i-f icc ice icf ich ici ico icp icr ics ie- iec iee ief iei iep ier ies ifc ife iff ifi ifo ifp ifr ifs ihc ihe ihf ihh ihi iho ihp ihr ihs iic iie iif iih iii iio iip iir iis io- ioc ioe iof ioh ioi ioo iop ior ios ipc ipe ipf ipi ipo ipp ipr ips ir- irc ire irf iri iro irp irr irs is- isc ise isf ish isi iso isp isr iss o-i oc- occ ocf och oci oco ocp ocr ocs oec oee oef oeh oei oeo oep oer oes of- ofc ofe off ofi ofo ofp ofr ofs ohc ohe ohf ohh ohi oho ohp ohr ohs oic oie oif oii oio oip oir ois oo- ooc oof ooh ooi ooo oop oor oos op- opc ope opf oph opi opo opp opr ops or- orc ore orf orh ori oro orp orr ors os- osc ose osf osh osi oso osp osr oss p-p pcc pce pcf pch pci pco pcp pcr pcs pec pee pef peh pei peo pep per pes pfc pfe pff pfi pfo pfp pfr pfs phc phe phf phi pho php phr phs pic pie pif pih pii pio pip pir pis poc poe pof poh poi poo pop por pos ppc ppe ppf pph ppi ppo ppp ppr pps prc pre prf prh pri pro prp prr prs ps- psc pse psf psh psi pso psp psr pss rcc rce rcf rch rci rco rcp rcr rcs re- rec ree ref reh rei reo rep rer res rfc rfe rff rfh rfi rfo rfp rfr rfs rh- rhc rhe rhf rhh rhi rho rhp rhr rhs ric rie rif rih rii rio rip rir ris roc roe rof roh roi roo rop ror ros rpc rpe rpf rph rpi rpo rpp rpr rps rrc rrf rrh rri rrp rrr rrs rsc rse rsf rsh rsi rso rsp rsr rss scc sce scf sch sci sco scp scr scs se- sec see sef seh sei seo sep ser ses sfc sfe sff sfh sfi sfo sfp sfr sfs sh- shc she shf shh shi sho shp shr shs sic sie sif sih sii sio sip sir sis soc soe sof soh soi soo sop sor sos spc spe spf sph spi spo spp spr sps sr- src sre srf srh sri sro srp srr srs ss- ssc sse ssf ssh ssi sso ssp ssr sss