-er -ic bbb bbc bbe bbg bbi bbm bbo bbr bcb bcc bce bcg bci bcm bco bcr be- beb bec bee beg bei bem beo ber bgb bgc bge bgg bgi bgm bgo bgr bi- bib bic bie big bii bim bio bir bmb bmc bme bmg bmi bmm bmo bmr bob boc boe bog boi bom boo bor brb bre brg bri brm bro brr c-- cbb cbc cbe cbg cbi cbm cbo cbr ccb ccc cce ccg cci ccm cco ccr ce- ceb cec cee ceg cei cem ceo cer cgb cgc cge cgg cgi cgm cgo cgr ci- cib cic cie cig cii cim cio cir cmb cmc cme cmg cmi cmm cmo cmr co- cob coc coe cog coi com coo cor crb crc cre crg cri crm cro crr ebb ebc ebe ebg ebi ebm ebo ebr ec- ecb ecc ece ecg eci ecm eco ecr eeb eec eee eeg eem eeo eer egb egc ege egg egi egm ego egr eib eic eie eig eii eim eio eir em- emb emc eme emg emi emm emo emr eo- eob eoc eoe eog eoi eom eoo eor erb erc ere erg eri erm ero err gbc gbe gbg gbi gbm gbo gbr gcb gcc gce gcg gci gcm gco gcr ge- geb gec gee geg gei gem geo ger ggb ggc ggg ggi ggm ggo ggr gib gic gie gig gii gim gio gir gmb gmc gme gmg gmi gmm gmo gmr gob goc goe gog goi gom goo gor grb grc gre grg gri grm gro grr ibb ibc ibe ibg ibi ibm ibo ibr icb icc ice icg ici icm ico icr ie- iec iee ieg iei iem ier igb igc ige igg igi igm igo igr iib iic iie iii iim iio iir im- imb imc ime img imi imm imo io- iob ioc ioe iog ioi iom ioo ior ir- irb irc ire irg iri irm iro irr m-o m-r mbb mbc mbe mbg mbi mbm mbo mbr mc- mcb mcc mce mcg mci mcm mco mcr meb mec mee meg mei mem meo mer mgb mgc mge mgi mgm mgo mgr mi- mib mic mie mig mii mim mio mir mmb mmc mme mmg mmi mmm mmo mmr mob moc moe mog moi mom moo mor mrb mrc mre mrg mri mrm mro mrr o-i ob- obb obc obe obg obi obm obo obr oc- ocb occ ocg oci ocm oco ocr oeb oec oee oeg oei oem oeo oer ogc oge ogg ogi ogo oib oic oie oii oim oio oir om- omb omc ome omg omi omm omo omr oo- oob ooc oog ooi oom ooo oor or- orb orc ore org ori orm oro orr rbb rbc rbe rbg rbi rbm rbo rbr rcb rcc rce rcg rci rcm rco rcr re- reb rec ree reg rei rem reo rer rgb rgc rge rgg rgi rgo rgr rib ric rie rig rii rim rio rir rmb rmc rme rmg rmi rmm rmo rmr rob roc roe rog roi rom roo ror rrb rrc rrg rri rrm rrr