-er -ic bbb bbc bbe bbf bbi bbm bbo bbr bcb bcc bce bcf bci bcm bco bcr be- beb bec bee bef bei bem beo ber bfb bfc bfe bff bfi bfm bfo bfr bi- bib bic bie bif bii bim bio bir bmb bmc bme bmf bmi bmm bmo bmr bob boc boe bof boi bom boo bor brb bre brf bri brm bro brr c-- cbb cbc cbe cbf cbi cbm cbo cbr ccb ccc cce ccf cci ccm cco ccr ce- ceb cec cee cef cei cem ceo cer cfb cfc cfe cff cfi cfm cfo cfr ci- cib cic cie cif cii cim cio cir cmb cmc cme cmf cmi cmm cmo cmr co- cob coc coe cof coi com coo cor crb crc cre crf cri crm cro crr ebb ebc ebe ebf ebi ebm ebo ebr ec- ecb ecc ece ecf eci ecm eco ecr eeb eec eee eef eem eeo eer ef- efb efc efe eff efi efm efo efr eib eic eie eif eii eim eio eir em- emb emc eme emf emi emm emo emr eo- eob eoc eoe eof eoi eom eoo eor erb erc ere erf eri erm ero err fbb fbc fbe fbf fbi fbm fbo fbr fcb fcc fce fcf fci fcm fco fcr feb fec fee fef fei fem feo fer ffc ffe fff ffi ffm ffo ffr fib fic fie fif fii fim fir fmb fmc fme fmf fmi fmm fmo fmr fob foc foe fof foi fom foo for frb frc fre frf fri frm fro frr i-f ibb ibc ibe ibf ibi ibm ibo ibr icb icc ice icf ici icm ico icr ie- iec iee ief iei iem ier ifb ifc ife iff ifi ifm ifo ifr iib iic iie iif iii iim iio iir im- imb imc ime imf imi imm imo io- iob ioc ioe iof ioi iom ioo ior ir- irb irc ire irf iri irm iro irr m-f m-o m-r mbb mbc mbe mbf mbi mbm mbo mbr mc- mcb mcc mce mcf mci mcm mco mcr meb mec mee mef mei mem meo mer mfb mfc mfe mff mfi mfm mfo mfr mi- mib mic mie mif mii mim mio mir mmb mmc mme mmf mmi mmm mmo mmr mob moc moe mof moi mom moo mor mrb mrc mre mrf mri mrm mro mrr o-i ob- obb obc obe obf obi obm obo obr oc- ocb occ ocf oci ocm oco ocr oeb oec oee oef oei oem oeo oer of- ofb ofc ofe off ofi ofm ofo ofr oib oic oie oif oii oim oio oir om- omb omc ome omf omi omm omo omr oo- oob ooc oof ooi oom ooo oor or- orb orc ore orf ori orm oro orr rbb rbc rbe rbf rbi rbm rbo rbr rcb rcc rce rcf rci rcm rco rcr re- reb rec ree ref rei rem reo rer rfb rfc rfe rff rfi rfm rfo rfr rib ric rie rif rii rim rio rir rmb rmc rme rmf rmi rmm rmo rmr rob roc roe rof roi rom roo ror rrb rrc rrf rri rrm rrr