-er -ic b-p bbb bbc bbe bbi bbp bbr bbs bcb bcc bce bci bcp bcr bcs bcv be- beb bec bee bei bep ber bes bev bi- bib bic bie bii bip bir bis biv bpb bpc bpe bpi bpp bpr bps bpv brb bre bri brp brr brs brv bsb bsc bse bsi bsp bsr bss bsv bvb bvc bve bvi bvp bvr bvs bvv c-- cbb cbc cbe cbi cbp cbr cbs cbv ccb ccc cce cci ccp ccr ccs ccv ce- ceb cec cee cei cep cer ces cev ci- cib cic cie cii cip cir cis civ cpb cpc cpe cpi cpp cpr cps cpv crb crc cre cri crp crr crs crv csb csc cse csi csp csr css csv cvb cvc cve cvi cvp cvr cvs cvv ebb ebc ebe ebi ebp ebr ebs ebv ec- ecb ecc ece eci ecr ecs ecv eeb eec eee eep eer ees eev eib eic eie eii eip eir eis eiv ep- epb epc epe epi epp epr eps erb erc ere eri erp err ers erv es- esb esc ese esi esp esr ess esv evb evc eve evi evp evr evs evv i-v ibb ibc ibe ibi ibp ibr ibs ibv icb icc ice ici icp icr ics icv ie- iec iee iei iep ier ies iev iib iic iie iii iip iir iis ipb ipc ipe ipi ipp ipr ips ipv ir- irb irc ire iri irp irr irs irv is- isb isc ise isi isp isr iss isv ivb ivc ive ivi ivp ivr ivs ivv p-p pbb pbc pbe pbi pbp pbr pbs pcb pcc pce pci pcp pcr pcs pcv peb pec pee pei pep per pes pev pib pic pie pii pip pir pis piv ppb ppc ppe ppi ppp ppr pps ppv prb prc pre pri prp prr prs prv ps- psb psc pse psi psp psr pss psv pvb pvc pve pvi pvp pvr pvs pvv rbb rbc rbe rbi rbp rbr rbs rcb rcc rce rci rcp rcr rcs rcv re- reb rec ree rei rep rer res rev rib ric rie rii rip rir ris riv rpb rpc rpe rpi rpp rpr rps rpv rrb rrc rri rrp rrr rrs rsb rsc rse rsi rsp rsr rss rsv rvb rvc rve rvi rvp rvr rvs rvv sbb sbc sbe sbi sbp sbr sbs sbv scb scc sce sci scp scr scs scv se- seb sec see sei sep ser ses sev sib sic sie sii sip sir sis siv spb spc spe spi spp spr sps spv sr- srb src sre sri srp srr srs srv ss- ssb ssc sse ssi ssp ssr sss ssv svb svc sve svi svp svr svs svv v-e vbc vbi vbr vbs vbv vcc vce vci vcp vcr vcs veb vec vee vei vep ver ves vi- vib vic vie vii vip vir vis viv vpb vpc vpe vpi vpp vpr vps vrb vrc vre vri vrp vrr vrs vsb vsc vse vsi vsp vsr vss vsv vvb vvc vvi vvr vvs vvv