nbc nbd nbe nbf nbi nbn nbr nbs nca ncb ncc ncd nce ncf nch nci ncn ncr ncs nda ndb ndc ndd nde ndf ndh ndi ndn ndr nds ne- nea neb nec ned nee nef neh nei nen ner nes nfa nfb nfc nfd nfe nff nfi nfn nfr nfs nha nhb nhc nhd nhe nhf nhh nhi nhn nhr nhs nia nib nic nid nie nif nih nii nin nir nis nna nnb nnc nne nnf nnh nni nnn nns nra nrb nrc nrd nre nrf nri nrn nrr nrs nsa nsb nsc nsd nse nsf nsh nsi nsn nsr nss ra- raa rab rac rad rae raf rah rai ran rar ras rba rbb rbc rbd rbe rbf rbh rbi rbn rbr rbs rca rcb rcc rcd rce rcf rch rci rcn rcr rcs rda rdb rdc rdd rde rdf rdh rdi rdn rdr rds re- rea reb rec red ree ref reh rei ren rer res rfa rfb rfc rfd rfe rff rfh rfi rfn rfr rfs rh- rha rhb rhc rhd rhe rhf rhh rhi rhn rhr rhs ria rib ric rid rie rif rih rii rin rir ris rna rnb rnc rnd rnh rni rnn rnr rns rra rrb rrc rrd rrf rrh rri rrn rrr rrs rsa rsb rsc rsd rse rsf rsh rsi rsn rsr rss saa sab sac sad sae saf sah sai san sar sas sba sbb sbc sbd sbe sbf sbh sbi sbn sbr sbs sca scb scc scd sce scf sch sci scn scr scs sda sdb sdc sdd sde sdf sdh sdi sdn sdr sds se- sea seb sec sed see sef seh sei sen ser ses sfa sfb sfc sfd sfe sff sfh sfi sfn sfr sfs sh- sha shb shc shd she shf shh shi shn shr shs sia sib sic sid sie sif sih sii sin sir sis sna snb snc snd sne snf sni snn snr sns sr- sra srb src srd sre srf srh sri srn srr srs ss- ssa ssb ssc ssd sse ssf ssh ssi ssn ssr sss