-er b-p bbb bbe bbi bbn bbp bbr be- beb bee bei ben bep ber bev bi- bib bie bii bin bip bir biv bnb bne bni bnn bnp bnr bnv bpb bpe bpi bpn bpp bpr bpv brb bre bri brn brp brr brv bvb bve bvi bvn bvp bvr bvv ebb ebe ebi ebn ebp ebr ebv eeb eee een eep eer eev eib eie eii ein eip eir eiv en- enb ene eni enn enp enr env ep- epb epe epi epn epp epr erb ere eri ern erp err erv evb eve evi evn evp evr evv i-v ibb ibe ibi ibn ibp ibr ibv ie- iee iei ien iep ier iev iib iie iii iin iip iir in- inb ine ini inn inp inr inv ipb ipe ipi ipn ipp ipr ipv ir- irb ire iri irn irp irr irv ivb ive ivi ivp ivr ivv n-i nbb nbe nbi nbn nbp nbr nbv ne- neb nee nei nen nep ner nev nib nie nii nin nip nir niv nnb nne nni nnn nnp nnv npb npe npi npn npp npr npv nrb nre nri nrn nrp nrr nrv nvb nve nvi nvn nvp nvv p-p pbb pbe pbi pbn pbp pbr peb pee pei pen pep per pev pib pie pii pin pip pir piv pn- pnb pne pni pnn pnp pnr pnv ppb ppe ppi ppn ppp ppr ppv prb pre pri prn prp prr prv pvb pve pvi pvn pvp pvr pvv rbb rbe rbi rbn rbp rbr re- reb ree rei ren rep rer rev rib rie rii rin rip rir riv rnb rni rnn rnp rnr rnv rpb rpe rpi rpn rpp rpr rpv rrb rri rrn rrp rrr rvb rve rvi rvn rvp rvr rvv v-e vbi vbr vbv veb vee vei ven vep ver vi- vib vie vii vin vip vir viv vn- vni vnp vnr vnv vpb vpe vpi vpn vpp vpr vrb vre vri vrn vrp vrr vvb vvi vvr vvv