-er bbb bbe bbf bbh bbi bbk bbn bbo bbr be- beb bee bef beh bei bek ben beo ber bfb bfe bff bfh bfi bfn bfo bfr bhb bhe bhf bhh bhi bhk bho bhr bi- bib bie bif bih bii bik bin bio bir bkb bke bkf bkk bkn bko bkr bnb bne bnf bni bnk bnn bno bnr bob boe bof boh boi bok bon boo bor brb bre brf brh bri brk brn bro brr ebb ebe ebf ebh ebi ebk ebn ebo ebr eeb eee eef eek een eeo eer ef- efb efe eff efh efi efo efr ehb ehe ehf ehh ehi ehn eho ehr eib eie eif eii eik ein eio eir ekb eke ekf ekh eki eko ekr en- enb ene enf enh eni enk enn eno enr eo- eob eoe eof eoh eoi eok eon eoo eor erb ere erf erh eri erk ern ero err fbb fbe fbf fbh fbi fbk fbn fbo fbr feb fee fef feh fei fek fen feo fer ffe fff ffh ffi ffk ffn ffo ffr fhb fhe fhf fhh fhi fhn fho fhr fib fie fif fih fii fik fin fir fkb fkf fki fkk fnb fne fnf fnh fni fnk fnn fnr fob foe fof foh foi fok fon foo for frb fre frf frh fri frk frn fro frr h-i hbb hbe hbf hbh hbi hbk hbn hbo hbr he- heb hee hef heh hei hek hen heo her hfb hfe hff hfh hfi hfk hfn hfo hfr hhb hhe hhf hhh hhi hhk hhn hho hhr hib hie hif hih hii hik hin hio hir hkb hkf hkh hki hkk hkn hko hkr hnb hne hnf hnh hnk hnn hno hob hoe hof hoh hoi hok hon hoo hor hr- hrb hre hrf hrh hri hrk hrn hro hrr i-f ibb ibe ibf ibh ibi ibk ibn ibo ibr ie- iee ief iei iek ien ier ifb ife iff ifi ifn ifo ifr ihb ihe ihf ihh ihi ihk ihn iho ihr iib iie iif iih iii iin iio iir ikb ike ikf iki ikk iko ikr in- inb ine inf inh ini ink inn ino inr io- iob ioe iof ioh ioi ion ioo ior ir- irb ire irf iri irk irn iro irr kbb kbe kbf kbh kbi kbk kbn kbo kbr ke- keb kee kef keh kei kek ken keo ker kff kfh kfi kfo khe khf khh khi khk khn kho khr kib kie kif kih kii kik kin kio kir kkb kke kkh kki kkk kkn kkr kn- kne knf kni knk knn kno knr kob koe kof koh koi kok kon koo kor krf kri krk krn kro krr n-i nbb nbe nbf nbi nbk nbn nbo nbr ne- neb nee nef neh nei nek nen neo ner nfb nfe nff nfi nfk nfn nfo nfr nhb nhe nhf nhh nhi nhk nhn nhr nib nie nif nih nii nik nin nio nir nke nkf nki nkk nkn nko nkr nnb nne nnf nnh nni nnk nnn nno no- nob noe nof noh noi nok non noo nor nrb nre nrf nri nrk nrn nro nrr o-i ob- obb obe obf obh obi obk obn obo obr oeb oee oef oeh oei oen oeo oer of- ofb ofe off ofi ofn ofo ofr ohe ohf ohh ohi ohn oho ohr oib oie oif oii oik oin oio oir okb oke oki okk oko okr on- onb one onf onh oni onk onn ono onr oo- oob oof ooh ooi ook oon ooo oor or- orb ore orf orh ori ork orn oro orr rbb rbe rbf rbh rbi rbk rbn rbo rbr re- reb ree ref reh rei rek ren reo rer rfb rfe rff rfh rfi rfk rfn rfo rfr rh- rhb rhe rhf rhh rhi rhn rho rhr rib rie rif rih rii rik rin rio rir rkb rke rkf rkk rko rnb rnh rni rnn rno rnr rob roe rof roh roi rok ron roo ror rrb rrf rrh rri rrk rrn rrr