-er -ic b-p bbb bbc bbe bbi bbm bbp bbr bbs bcb bcc bce bci bcm bcp bcr bcs be- beb bec bee bei bem bep ber bes bi- bib bic bie bii bim bip bir bis bmb bmc bme bmi bmm bmp bmr bms bpb bpc bpe bpi bpm bpp bpr bps brb bre bri brm brp brr brs bsb bsc bse bsi bsm bsp bsr bss c-- cbb cbc cbe cbi cbm cbp cbr cbs ccb ccc cce cci ccm ccp ccr ccs ce- ceb cec cee cei cem cep cer ces ci- cib cic cie cii cim cip cir cis cmb cmc cme cmi cmm cmp cmr cms cpb cpc cpe cpi cpm cpp cpr cps crb crc cre cri crm crp crr crs csb csc cse csi csm csp csr css ebb ebc ebe ebi ebm ebp ebr ebs ec- ecb ecc ece eci ecm ecr ecs eeb eec eee eem eep eer ees eib eic eie eii eim eip eir eis em- emb emc eme emi emm emp emr ems ep- epb epc epe epi epm epp epr eps erb erc ere eri erm erp err ers es- esb esc ese esi esm esp esr ess ibb ibc ibe ibi ibm ibp ibr ibs icb icc ice ici icm icp icr ics ie- iec iee iei iem iep ier ies iib iic iie iii iim iip iir iis im- imb imc ime imi imm imp ims ipb ipc ipe ipi ipm ipp ipr ips ir- irb irc ire iri irm irp irr irs is- isb isc ise isi ism isp isr iss m-r mbb mbc mbe mbi mbm mbp mbr mbs mc- mcb mcc mce mci mcm mcp mcr mcs meb mec mee mei mem mep mer mes mi- mib mic mie mii mim mip mir mis mmb mmc mme mmi mmm mmp mmr mms mpb mpc mpe mpi mpm mpp mpr mps mrb mrc mre mri mrm mrp mrr mrs msb msc mse msi msm msp msr mss p-p pbb pbc pbe pbi pbm pbp pbr pbs pcb pcc pce pci pcm pcp pcr pcs peb pec pee pei pem pep per pes pib pic pie pii pim pip pir pis pmb pmc pme pmi pmm pmp pmr pms ppb ppc ppe ppi ppm ppp ppr pps prb prc pre pri prm prp prr prs ps- psb psc pse psi psm psp psr pss rbb rbc rbe rbi rbm rbp rbr rbs rcb rcc rce rci rcm rcp rcr rcs re- reb rec ree rei rem rep rer res rib ric rie rii rim rip rir ris rmb rmc rme rmi rmm rmp rmr rms rpb rpc rpe rpi rpm rpp rpr rps rrb rrc rri rrm rrp rrr rrs rsb rsc rse rsi rsm rsp rsr rss sbb sbc sbe sbi sbm sbp sbr sbs scb scc sce sci scm scp scr scs se- seb sec see sei sem sep ser ses sib sic sie sii sim sip sir sis smb smc sme smi smm smp smr sms spb spc spe spi spm spp spr sps sr- srb src sre sri srm srp srr srs ss- ssb ssc sse ssi ssm ssp ssr sss