-er -ic bbb bbc bbe bbf bbg bbi bbm bbo bbr bbs bcb bcc bce bcf bcg bci bcm bco bcr bcs be- beb bec bee bef beg bei bem beo ber bes bfb bfc bfe bff bfg bfi bfm bfo bfr bfs bgb bgc bge bgf bgg bgi bgm bgo bgr bgs bi- bib bic bie bif big bii bim bio bir bis bmb bmc bme bmf bmg bmi bmm bmo bmr bms bob boc boe bof bog boi bom boo bor bos brb bre brf brg bri brm bro brr brs bsb bsc bse bsf bsg bsi bsm bso bsr bss c-- cbb cbc cbe cbf cbg cbi cbm cbo cbr cbs ccb ccc cce ccf ccg cci ccm cco ccr ccs ce- ceb cec cee cef ceg cei cem ceo cer ces cfb cfc cfe cff cfg cfi cfm cfo cfr cfs cgb cgc cge cgg cgi cgm cgo cgr cgs ci- cib cic cie cif cig cii cim cio cir cis cmb cmc cme cmf cmg cmi cmm cmo cmr cms co- cob coc coe cof cog coi com coo cor cos crb crc cre crf crg cri crm cro crr crs csb csc cse csf csg csi csm cso csr css ebb ebc ebe ebf ebg ebi ebm ebo ebr ebs ec- ecb ecc ece ecf ecg eci ecm eco ecr ecs eeb eec eee eef eeg eem eeo eer ees ef- efb efc efe eff efg efi efm efo efr efs egb egc ege egf egg egi egm ego egr egs eib eic eie eif eig eii eim eio eir eis em- emb emc eme emf emg emi emm emo emr ems eo- eob eoc eoe eof eog eoi eom eoo eor eos erb erc ere erf erg eri erm ero err ers es- esb esc ese esf esg esi esm eso esr ess fbb fbc fbe fbf fbg fbi fbm fbo fbr fbs fcb fcc fce fcf fcg fci fcm fco fcr fcs feb fec fee fef feg fei fem feo fer fes ffc ffe fff ffg ffi ffm ffo ffr ffs fgb fgc fge fgf fgg fgi fgm fgr fgs fib fic fie fif fig fii fim fir fis fmb fmc fme fmf fmg fmi fmm fmo fmr fms fob foc foe fof fog foi fom foo for fos frb frc fre frf frg fri frm fro frr frs fsb fsc fse fsf fsg fsi fsm fso fsr fss gbc gbe gbf gbg gbi gbm gbo gbr gbs gcb gcc gce gcf gcg gci gcm gco gcr gcs ge- geb gec gee gef geg gei gem geo ger ges gfb gfc gfe gff gfi gfm gfo gfr gfs ggb ggc ggg ggi ggm ggo ggr ggs gib gic gie gif gig gii gim gio gir gis gmb gmc gme gmf gmg gmi gmm gmo gmr gms gob goc goe gof gog goi gom goo gor gos grb grc gre grf grg gri grm gro grr grs gsb gsc gse gsf gsg gsi gsm gso gsr gss i-f ibb ibc ibe ibf ibg ibi ibm ibo ibr ibs icb icc ice icf icg ici icm ico icr ics ie- iec iee ief ieg iei iem ier ies ifb ifc ife iff ifg ifi ifm ifo ifr ifs igb igc ige igf igg igi igm igo igr igs iib iic iie iif iii iim iio iir iis im- imb imc ime imf img imi imm imo ims io- iob ioc ioe iof iog ioi iom ioo ior ios ir- irb irc ire irf irg iri irm iro irr irs is- isb isc ise isf isg isi ism iso isr iss m-f m-o m-r mbb mbc mbe mbf mbg mbi mbm mbo mbr mbs mc- mcb mcc mce mcf mcg mci mcm mco mcr mcs meb mec mee mef meg mei mem meo mer mes mfb mfc mfe mff mfg mfi mfm mfo mfr mfs mgb mgc mge mgf mgi mgm mgo mgr mgs mi- mib mic mie mif mig mii mim mio mir mis mmb mmc mme mmf mmg mmi mmm mmo mmr mms mob moc moe mof mog moi mom moo mor mos mrb mrc mre mrf mrg mri mrm mro mrr mrs msb msc mse msf msg msi msm mso msr mss o-i ob- obb obc obe obf obg obi obm obo obr obs oc- ocb occ ocf ocg oci ocm oco ocr ocs oeb oec oee oef oeg oei oem oeo oer oes of- ofb ofc ofe off ofg ofi ofm ofo ofr ofs ogc oge ogf ogg ogi ogo ogs oib oic oie oif oii oim oio oir ois om- omb omc ome omf omg omi omm omo omr oms oo- oob ooc oof oog ooi oom ooo oor oos or- orb orc ore orf org ori orm oro orr ors os- osb osc ose osf osg osi osm oso osr oss rbb rbc rbe rbf rbg rbi rbm rbo rbr rbs rcb rcc rce rcf rcg rci rcm rco rcr rcs re- reb rec ree ref reg rei rem reo rer res rfb rfc rfe rff rfg rfi rfm rfo rfr rfs rgb rgc rge rgf rgg rgi rgo rgr rgs rib ric rie rif rig rii rim rio rir ris rmb rmc rme rmf rmg rmi rmm rmo rmr rms rob roc roe rof rog roi rom roo ror ros rrb rrc rrf rrg rri rrm rrr rrs rsb rsc rse rsf rsg rsi rsm rso rsr rss sbb sbc sbe sbf sbg sbi sbm sbo sbr sbs scb scc sce scf scg sci scm sco scr scs se- seb sec see sef seg sei sem seo ser ses sfb sfc sfe sff sfg sfi sfm sfo sfr sfs sgb sgc sge sgf sgg sgi sgm sgo sgr sgs sib sic sie sif sig sii sim sio sir sis smb smc sme smf smg smi smm smo smr sms sob soc soe sof sog soi som soo sor sos sr- srb src sre srf srg sri srm sro