-er -ic b-p bbb bbc bbe bbi bbo bbp bbr bcb bcc bce bci bco bcp bcr bcv be- beb bec bee bei beo bep ber bev bi- bib bic bie bii bio bip bir biv bob boc boe boi boo bop bor bov bpb bpc bpe bpi bpo bpp bpr bpv brb bre bri bro brp brr brv bvb bvc bve bvi bvo bvp bvr bvv c-- cbb cbc cbe cbi cbo cbp cbr cbv ccb ccc cce cci cco ccp ccr ccv ce- ceb cec cee cei ceo cep cer cev ci- cib cic cie cii cio cip cir civ co- cob coc coe coi coo cop cor cov cpb cpc cpe cpi cpo cpp cpr cpv crb crc cre cri cro crp crr crv cvb cvc cve cvi cvo cvp cvr cvv ebb ebc ebe ebi ebo ebp ebr ebv ec- ecb ecc ece eci eco ecr ecv eeb eec eee eeo eep eer eev eib eic eie eii eio eip eir eiv eo- eob eoc eoe eoi eoo eop eor ep- epb epc epe epi epo epp epr erb erc ere eri ero erp err erv evb evc eve evi evo evp evr evv i-v ibb ibc ibe ibi ibo ibp ibr ibv icb icc ice ici ico icp icr icv ie- iec iee iei iep ier iev iib iic iie iii iio iip iir io- iob ioc ioe ioi ioo iop ior iov ipb ipc ipe ipi ipo ipp ipr ipv ir- irb irc ire iri iro irp irr irv ivb ivc ive ivi ivo ivp ivr ivv o-i ob- obb obc obe obi obo obp obr obv oc- ocb occ oci oco ocp ocr ocv oeb oec oee oei oeo oep oer oib oic oie oii oio oip oir oiv oo- oob ooc ooi ooo oop oor oov op- opb opc ope opi opo opp opr opv or- orb orc ore ori oro orp orr orv ov- ovb ovc ove ovi ovo ovp ovv p-p pbb pbc pbe pbi pbo pbp pbr pcb pcc pce pci pco pcp pcr pcv peb pec pee pei peo pep per pev pib pic pie pii pio pip pir piv pob poc poe poi poo pop por pov ppb ppc ppe ppi ppo ppp ppr ppv prb prc pre pri pro prp prr prv pvb pvc pve pvi pvo pvp pvr pvv rbb rbc rbe rbi rbo rbp rbr rcb rcc rce rci rco rcp rcr rcv re- reb rec ree rei reo rep rer rev rib ric rie rii rio rip rir riv rob roc roe roi roo rop ror rov rpb rpc rpe rpi rpo rpp rpr rpv rrb rrc rri rrp rrr rvb rvc rve rvi rvo rvp rvr rvv v-e vbc vbi vbo vbr vbv vcc vce vci vco vcp vcr veb vec vee vei veo vep ver vi- vib vic vie vii vio vip vir viv vob voc voe voi voo vop vor vov vpb vpc vpe vpi vpo vpp vpr vrb vrc vre vri vrp vrr vvb vvc vvi vvo vvr vvv