-er -ic bbb bbc bbe bbg bbi bbn bbo bbr bbs bcb bcc bce bcg bci bcn bco bcr bcs be- beb bec bee beg bei ben beo ber bes bgb bgc bge bgg bgi bgn bgo bgr bgs bi- bib bic bie big bii bin bio bir bis bnb bnc bne bng bni bnn bno bnr bns bob boc boe bog boi bon boo bor bos brb bre brg bri brn bro brr brs bsb bsc bse bsg bsi bsn bso bsr bss c-- cbb cbc cbe cbg cbi cbn cbo cbr cbs ccb ccc cce ccg cci ccn cco ccr ccs ce- ceb cec cee ceg cei cen ceo cer ces cgb cgc cge cgg cgi cgn cgo cgr cgs ci- cib cic cie cig cii cin cio cir cis cn- cnb cnc cne cng cni cnn cno cnr cns co- cob coc coe cog coi con coo cor cos crb crc cre crg cri crn cro crr crs csb csc cse csg csi csn cso csr css ebb ebc ebe ebg ebi ebn ebo ebr ebs ec- ecb ecc ece ecg eci ecn eco ecr ecs eeb eec eee eeg een eeo eer ees egb egc ege egg egi egn ego egr egs eib eic eie eig eii ein eio eir eis en- enb enc ene eng eni enn eno enr ens eo- eob eoc eoe eog eoi eon eoo eor eos erb erc ere erg eri ern ero err ers es- esb esc ese esg esi esn eso esr ess gbc gbe gbg gbi gbn gbo gbr gbs gcb gcc gce gcg gci gcn gco gcr gcs ge- geb gec gee geg gei gen geo ger ges ggb ggc ggg ggi ggn ggo ggr ggs gib gic gie gig gii gin gio gir gis gnb gnc gne gni gnn gno gnr gns gob goc goe gog goi gon goo gor gos grb grc gre grg gri grn gro grr grs gsb gsc gse gsg gsi gsn gso gsr gss ibb ibc ibe ibg ibi ibn ibo ibr ibs icb icc ice icg ici icn ico icr ics ie- iec iee ieg iei ien ier ies igb igc ige igg igi ign igo igr igs iib iic iie iii iin iio iir iis in- inb inc ine ing ini inn ino inr ins io- iob ioc ioe iog ioi ion ioo ior ios ir- irb irc ire irg iri irn iro irr irs is- isb isc ise isg isi isn iso isr iss n-i nbb nbc nbe nbg nbi nbn nbo nbr nbs ncb ncc nce ncg nci ncn nco ncr ncs ne- neb nec nee neg nei nen neo ner nes ngb ngc nge ngg ngi ngn ngo ngs nib nic nie nig nii nin nio nir nis nnb nnc nne nng nni nnn nno nns no- nob noc noe nog noi non noo nor nos nrb nrc nre nrg nri nrn nro nrr nrs nsb nsc nse nsg nsi nsn nso nsr nss o-i ob- obb obc obe obg obi obn obo obr obs oc- ocb occ ocg oci ocn oco ocr ocs oeb oec oee oeg oei oen oeo oer oes ogc oge ogg ogi ogn ogo ogs oib oic oie oii oin oio oir ois on- onb onc one ong oni onn ono onr ons oo- oob ooc oog ooi oon ooo oor oos or- orb orc ore org ori orn oro orr ors os- osb osc ose osg osi osn oso osr oss rbb rbc rbe rbg rbi rbn rbo rbr rbs rcb rcc rce rcg rci rcn rco rcr rcs re- reb rec ree reg rei ren reo rer res rgb rgc rge rgg rgi rgn rgo rgr rgs rib ric rie rig rii rin rio rir ris rnb rnc rng rni rnn rno rnr rns rob roc roe rog roi ron roo ror ros rrb rrc rrg rri rrn rrr rrs rsb rsc rse rsg rsi rsn rso rsr rss sbb sbc sbe sbg sbi sbn sbo sbr sbs scb scc sce scg sci scn sco scr scs se- seb sec see seg sei sen seo ser ses sgb sgc sge sgg sgi sgn sgo sgr sgs sib sic sie sig sii sin sio sir sis snb snc sne sng sni snn sno snr sns sob soc soe sog soi son soo sor sos sr- srb src sre srg sri srn sro srr srs ss- ssb ssc sse ssg ssi ssn sso ssr sss