-er b-p bbb bbe bbg bbi bbk bbn bbp bbr be- beb bee beg bei bek ben bep ber bgb bge bgg bgi bgk bgn bgp bgr bi- bib bie big bii bik bin bip bir bkb bke bkg bkk bkn bkp bkr bnb bne bng bni bnk bnn bnp bnr bpb bpe bpg bpi bpn bpp bpr brb bre brg bri brk brn brp brr ebb ebe ebg ebi ebk ebn ebp ebr eeb eee eeg eek een eep eer egb ege egg egi egn egp egr eib eie eig eii eik ein eip eir ekb eke ekg eki ekp ekr en- enb ene eng eni enk enn enp enr ep- epb epe epg epi epn epp epr erb ere erg eri erk ern erp err g-p gbe gbg gbi gbk gbn gbp gbr ge- geb gee geg gei gek gen gep ger ggb ggg ggi ggn ggp ggr gib gie gig gii gik gin gip gir gkb gkn gkp gnb gne gni gnn gnp gnr gpb gpe gpg gpi gpk gpn gpp gpr grb gre grg gri grk grn grp grr ibb ibe ibg ibi ibk ibn ibp ibr ie- iee ieg iei iek ien iep ier igb ige igg igi igk ign igp igr iib iie iii iin iip iir ikb ike iki ikk ikr in- inb ine ing ini ink inn inp inr ipb ipe ipg ipi ipn ipp ipr ir- irb ire irg iri irk irn irp irr kbb kbe kbi kbk kbn kbp kbr ke- keb kee keg kei kek ken kep ker kgb kgi kgp kib kie kig kii kik kin kip kir kkb kke kki kkk kkn kkp kkr kn- kne kng kni knk knn knp knr kpe kpi kpk kpn kpp kpr krg kri krk krn krp krr n-i nbb nbe nbg nbi nbk nbn nbp nbr ne- neb nee neg nei nek nen nep ner ngb nge ngg ngi ngk ngn ngp nib nie nig nii nik nin nip nir nke nki nkk nkn nkp nkr nnb nne nng nni nnk nnn nnp npb npe npg npi npn npp npr nrb nre nrg nri nrk nrn nrp nrr p-p pbb pbe pbg pbi pbk pbn pbp pbr peb pee peg pei pek pen pep per pgb pge pgg pgi pgk pgn pgp pgr pib pie pig pii pik pin pip pir pkb pke pkg pki pkn pkp pkr pn- pnb pne png pni pnk pnn pnp pnr ppb ppe ppg ppi ppk ppn ppp ppr prb pre prg pri prk prn prp prr rbb rbe rbg rbi rbk rbn rbp rbr re- reb ree reg rei rek ren rep rer rgb rge rgg rgi rgk rgn rgp rgr rib rie rig rii rik rin rip rir rkb rke rkg rkk rkp rnb rng rni rnn rnp rnr rpb rpe rpg rpi rpk rpn rpp rpr rrb rrg rri rrk rrn rrp rrr