-er -ic bbb bbc bbe bbf bbi bbm bbo bbr bbs bcb bcc bce bcf bci bcm bco bcr bcs be- beb bec bee bef bei bem beo ber bes bfb bfc bfe bff bfi bfm bfo bfr bfs bi- bib bic bie bif bii bim bio bir bis bmb bmc bme bmf bmi bmm bmo bmr bms bob boc boe bof boi bom boo bor bos brb bre brf bri brm bro brr brs bsb bsc bse bsf bsi bsm bso bsr bss c-- cbb cbc cbe cbf cbi cbm cbo cbr cbs ccb ccc cce ccf cci ccm cco ccr ccs ce- ceb cec cee cef cei cem ceo cer ces cfb cfc cfe cff cfi cfm cfo cfr cfs ci- cib cic cie cif cii cim cio cir cis cmb cmc cme cmf cmi cmm cmo cmr cms co- cob coc coe cof coi com coo cor cos crb crc cre crf cri crm cro crr crs csb csc cse csf csi csm cso csr css ebb ebc ebe ebf ebi ebm ebo ebr ebs ec- ecb ecc ece ecf eci ecm eco ecr ecs eeb eec eee eef eem eeo eer ees ef- efb efc efe eff efi efm efo efr efs eib eic eie eif eii eim eio eir eis em- emb emc eme emf emi emm emo emr ems eo- eob eoc eoe eof eoi eom eoo eor eos erb erc ere erf eri erm ero err ers es- esb esc ese esf esi esm eso esr ess fbb fbc fbe fbf fbi fbm fbo fbr fbs fcb fcc fce fcf fci fcm fco fcr fcs feb fec fee fef fei fem feo fer fes ffc ffe fff ffi ffm ffo ffr ffs fib fic fie fif fii fim fir fis fmb fmc fme fmf fmi fmm fmo fmr fms fob foc foe fof foi fom foo for fos frb frc fre frf fri frm fro frr frs fsb fsc fse fsf fsi fsm fso fsr fss i-f ibb ibc ibe ibf ibi ibm ibo ibr ibs icb icc ice icf ici icm ico icr ics ie- iec iee ief iei iem ier ies ifb ifc ife iff ifi ifm ifo ifr ifs iib iic iie iif iii iim iio iir iis im- imb imc ime imf imi imm imo ims io- iob ioc ioe iof ioi iom ioo ior ios ir- irb irc ire irf iri irm iro irr irs is- isb isc ise isf isi ism iso isr iss m-f m-o m-r mbb mbc mbe mbf mbi mbm mbo mbr mbs mc- mcb mcc mce mcf mci mcm mco mcr mcs meb mec mee mef mei mem meo mer mes mfb mfc mfe mff mfi mfm mfo mfr mfs mi- mib mic mie mif mii mim mio mir mis mmb mmc mme mmf mmi mmm mmo mmr mms mob moc moe mof moi mom moo mor mos mrb mrc mre mrf mri mrm mro mrr mrs msb msc mse msf msi msm mso msr mss o-i ob- obb obc obe obf obi obm obo obr obs oc- ocb occ ocf oci ocm oco ocr ocs oeb oec oee oef oei oem oeo oer oes of- ofb ofc ofe off ofi ofm ofo ofr ofs oib oic oie oif oii oim oio oir ois om- omb omc ome omf omi omm omo omr oms oo- oob ooc oof ooi oom ooo oor oos or- orb orc ore orf ori orm oro orr ors os- osb osc ose osf osi osm oso osr oss rbb rbc rbe rbf rbi rbm rbo rbr rbs rcb rcc rce rcf rci rcm rco rcr rcs re- reb rec ree ref rei rem reo rer res rfb rfc rfe rff rfi rfm rfo rfr rfs rib ric rie rif rii rim rio rir ris rmb rmc rme rmf rmi rmm rmo rmr rms rob roc roe rof roi rom roo ror ros rrb rrc rrf rri rrm rrr rrs rsb rsc rse rsf rsi rsm rso rsr rss sbb sbc sbe sbf sbi sbm sbo sbr sbs scb scc sce scf sci scm sco scr scs se- seb sec see sef sei sem seo ser ses sfb sfc sfe sff sfi sfm sfo sfr sfs sib sic sie sif sii sim sio sir sis smb smc sme smf smi smm smo smr sms sob soc soe sof soi som soo sor sos sr- srb src sre srf sri srm sro srr srs ss- ssb ssc sse ssf ssi ssm sso ssr sss