-er b-p bbb bbe bbg bbi bbn bbo bbp bbr be- beb bee beg bei ben beo bep ber bev bgb bge bgg bgi bgn bgo bgp bgr bgv bi- bib bie big bii bin bio bip bir biv bnb bne bng bni bnn bno bnp bnr bnv bob boe bog boi bon boo bop bor bov bpb bpe bpg bpi bpn bpo bpp bpr bpv brb bre brg bri brn bro brp brr brv bvb bve bvg bvi bvn bvo bvp bvr bvv ebb ebe ebg ebi ebn ebo ebp ebr ebv eeb eee eeg een eeo eep eer eev egb ege egg egi egn ego egp egr eib eie eig eii ein eio eip eir eiv en- enb ene eng eni enn eno enp enr env eo- eob eoe eog eoi eon eoo eop eor ep- epb epe epg epi epn epo epp epr erb ere erg eri ern ero erp err erv evb eve evg evi evn evo evp evr evv g-p gbe gbg gbi gbn gbo gbp gbr gbv ge- geb gee geg gei gen geo gep ger gev ggb ggg ggi ggn ggo ggp ggr ggv gib gie gig gii gin gio gip gir giv gnb gne gni gnn gno gnp gnr gnv gob goe gog goi gon goo gop gor gov gpb gpe gpg gpi gpn gpo gpp gpr grb gre grg gri grn gro grp grr grv gvb gve gvg gvi gvn gvo gvp gvr i-v ibb ibe ibg ibi ibn ibo ibp ibr ibv ie- iee ieg iei ien iep ier iev igb ige igg igi ign igo igp igr iib iie iii iin iio iip iir in- inb ine ing ini inn ino inp inr inv io- iob ioe iog ioi ion ioo iop ior iov ipb ipe ipg ipi ipn ipo ipp ipr ipv ir- irb ire irg iri irn iro irp irr irv ivb ive ivg ivi ivo ivp ivr ivv n-i nbb nbe nbg nbi nbn nbo nbp nbr nbv ne- neb nee neg nei nen neo nep ner nev ngb nge ngg ngi ngn ngo ngp nib nie nig nii nin nio nip nir niv nnb nne nng nni nnn nno nnp nnv no- nob noe nog noi non noo nop nor nov npb npe npg npi npn npo npp npr npv nrb nre nrg nri nrn nro nrp nrr nrv nvb nve nvg nvi nvn nvp nvv o-i ob- obb obe obg obi obn obo obp obr obv oeb oee oeg oei oen oeo oep oer oge ogg ogi ogn ogo ogp oib oie oii oin oio oip oir oiv on- onb one ong oni onn ono onp onr oo- oob oog ooi oon ooo oop oor oov op- opb ope opg opi opn opo opp opr opv or- orb ore org ori orn oro orp orr orv ov- ovb ove ovi ovo ovp ovv p-p pbb pbe pbg pbi pbn pbo pbp pbr peb pee peg pei pen peo pep per pev pgb pge pgg pgi pgn pgo pgp pgr pgv pib pie pig pii pin pio pip pir piv pn- pnb pne png pni pnn pno pnp pnr pnv pob poe pog poi pon poo pop por pov ppb ppe ppg ppi ppn ppo ppp ppr ppv prb pre prg pri prn pro prp prr prv pvb pve pvg pvi pvn pvo pvp pvr pvv rbb rbe rbg rbi rbn rbo rbp rbr re- reb ree reg rei ren reo rep rer rev rgb rge rgg rgi rgn rgo rgp rgr rgv rib rie rig rii rin rio rip rir riv rnb rng rni rnn rno rnp rnr rnv rob roe rog roi ron roo rop ror rov rpb rpe rpg rpi rpn rpo rpp rpr rpv rrb rrg rri rrn rrp rrr rvb rve rvg rvi rvn rvo rvp rvr rvv v-e vbg vbi vbo vbr vbv veb vee veg vei ven veo vep ver vgg vgn vgo vgp vgr vi- vib vie vig vii vin vio vip vir viv vn- vng vni vno vnp vnr vnv vob voe vog voi von voo vop vor vov vpb vpe vpg vpi vpn vpo vpp vpr vrb vre vrg vri vrn vrp vrr vvb vvg vvi vvo vvr vvv