-er -ic b-p bbb bbc bbe bbg bbi bbl bbp bbr bcb bcc bce bcg bci bcl bcp bcr be- beb bec bee beg bei bel bep ber bgb bgc bge bgg bgi bgl bgp bgr bi- bib bic bie big bii bil bip bir blb blc ble blg bli bll blp blr bpb bpc bpe bpg bpi bpl bpp bpr brb bre brg bri brl brp brr c-- cbb cbc cbe cbg cbi cbl cbp cbr ccb ccc cce ccg cci ccl ccp ccr ce- ceb cec cee ceg cei cel cep cer cgb cgc cge cgg cgi cgl cgp cgr ci- cib cic cie cig cii cil cip cir cl- clb clc cle clg cli cll clp clr cpb cpc cpe cpg cpi cpl cpp cpr crb crc cre crg cri crl crp crr ebb ebc ebe ebg ebi ebl ebp ebr ec- ecb ecc ece ecg eci ecl ecr eeb eec eee eeg eel eep eer egb egc ege egg egi egl egp egr eib eic eie eig eii eil eip eir elb elc ele elg eli ell elp elr ep- epb epc epe epg epi epl epp epr erb erc ere erg eri erl erp err g-p gbc gbe gbg gbi gbl gbp gbr gcb gcc gce gcg gci gcl gcp gcr ge- geb gec gee geg gei gel gep ger ggb ggc ggg ggi ggp ggr gib gic gie gig gii gil gip gir glb glc gle glg gli gll glp glr gpb gpc gpe gpg gpi gpl gpp gpr grb grc gre grg gri grl grp grr ibb ibc ibe ibg ibi ibl ibp ibr icb icc ice icg ici icl icp icr ie- iec iee ieg iei iel iep ier igb igc ige igg igi igl igp igr iib iic iie iii iil iip iir il- ilb ilc ile ilg ili ill ilp ilr ipb ipc ipe ipg ipi ipl ipp ipr ir- irb irc ire irg iri irl irp irr l-p lbb lbc lbe lbg lbi lbl lbp lbr lcb lcc lce lcg lci lcl lcp lcr leb lec lee leg lei lel lep ler lgb lgc lge lgg lgi lgl lgp lgr lib lic lie lig lii lil lip lir llb llc lle llg lli lll llp llr lpb lpc lpe lpg lpi lpl lpp lpr lrb lrc lrg lri lrp lrr p-p pbb pbc pbe pbg pbi pbl pbp pbr pcb pcc pce pcg pci pcl pcp pcr peb pec pee peg pei pel pep per pgb pgc pge pgg pgi pgl pgp pgr pib pic pie pig pii pil pip pir plb plc ple plg pli pll plp plr ppb ppc ppe ppg ppi ppl ppp ppr prb prc pre prg pri prl prp prr rbb rbc rbe rbg rbi rbl rbp rbr rcb rcc rce rcg rci rcl rcp rcr re- reb rec ree reg rei rel rep rer rgb rgc rge rgg rgi rgp rgr rib ric rie rig rii ril rip rir rlc rle rlg rli rll rlp rlr rpb rpc rpe rpg rpi rpl rpp rpr rrb rrc rrg rri rrl rrp rrr