-er b-p bbb bbe bbf bbi bbk bbn bbo bbp bbr bbt be- beb bee bef bei bek ben beo bep ber bet bfb bfe bff bfi bfn bfo bfp bfr bft bi- bib bie bif bii bik bin bio bip bir bit bkb bke bkf bkk bkn bko bkp bkr bkt bnb bne bnf bni bnk bnn bno bnp bnr bnt bob boe bof boi bok bon boo bop bor bot bpb bpe bpf bpi bpn bpo bpp bpr bpt brb bre brf bri brk brn bro brp brr brt btb bte btf bti btk btn bto btp btr btt ebb ebe ebf ebi ebk ebn ebo ebp ebr ebt eeb eee eef eek een eeo eep eer eet ef- efb efe eff efi efo efp efr eft eib eie eif eii eik ein eio eip eir eit ekb eke ekf eki eko ekp ekr ekt en- enb ene enf eni enk enn eno enp enr ent eo- eob eoe eof eoi eok eon eoo eop eor eot ep- epb epe epf epi epn epo epp epr ept erb ere erf eri erk ern ero erp err ert etb ete etf eti etk etn eto etp etr ett fbb fbe fbf fbi fbk fbn fbo fbp fbr fbt feb fee fef fei fek fen feo fep fer fet ffe fff ffi ffk ffn ffo ffp ffr fft fib fie fif fii fik fin fip fir fit fkb fkf fki fkk fkp fkt fnb fne fnf fni fnk fnn fnp fnr fnt fob foe fof foi fok fon foo fop for fot fpb fpe fpi fpk fpn fpo fpp fpr fpt frb fre frf fri frk frn fro frp frr frt ftb fte ftf fti ftk ftn fto ftp ftr ftt i-f ibb ibe ibf ibi ibk ibn ibo ibp ibr ibt ie- iee ief iei iek ien iep ier iet ifb ife iff ifi ifn ifo ifp ifr ift iib iie iif iii iin iio iip iir iit ikb ike ikf iki ikk iko ikr ikt in- inb ine inf ini ink inn ino inp inr int io- iob ioe iof ioi ion ioo iop ior iot ipb ipe ipf ipi ipn ipo ipp ipr ipt ir- irb ire irf iri irk irn iro irp irr irt itb ite itf iti itk itn ito itp itt k-t kbb kbe kbf kbi kbk kbn kbo kbp kbr ke- keb kee kef kei kek ken keo kep ker ket kff kfi kfo kib kie kif kii kik kin kio kip kir kit kkb kke kki kkk kkn kkp kkr kkt kn- kne knf kni knk knn kno knp knr knt kob koe kof koi kok kon koo kop kor kot kpe kpf kpi kpk kpn kpo kpp kpr kpt krf kri krk krn kro krp krr krt ktb kte ktf ktk ktn kto ktp ktr ktt n-i nbb nbe nbf nbi nbk nbn nbo nbp nbr nbt ne- neb nee nef nei nek nen neo nep ner net nfb nfe nff nfi nfk nfn nfo nfp nfr nft nib nie nif nii nik nin nio nip nir nit nke nkf nki nkk nkn nko nkp nkr nkt nnb nne nnf nni nnk nnn nno nnp nnt no- nob noe nof noi nok non noo nop nor not npb npe npf npi npn npo npp npr npt nrb nre nrf nri nrk nrn nro nrp nrr nrt ntb nte ntf nti ntk ntn nto ntp ntr ntt o-i ob- obb obe obf obi obk obn obo obp obr obt oeb oee oef oei oen oeo oep oer oet of- ofb ofe off ofi ofn ofo ofp ofr oft oib oie oif oii oik oin oio oip oir oit okb oke oki okk oko okp okr on- onb one onf oni onk onn ono onp onr ont oo- oob oof ooi ook oon ooo oop oor oot op- opb ope opf opi opk opn opo opp opr opt or- orb ore orf ori ork orn oro orp orr ort ot- otb ote otf oti otk otn oto otp otr ott p-p pbb pbe pbf pbi pbk pbn pbo pbp pbr pbt peb pee pef pei pek pen peo pep per pet pfb pfe pff pfi pfk pfn pfo pfp pfr pft pib pie pif pii pik pin pio pip pir pit pkb pke pkf pki pkn pko pkp pkr pkt pn- pnb pne pnf pni pnk pnn pno pnp pnr pnt pob poe pof poi pok pon poo pop por pot ppb ppe ppf ppi ppk ppn ppo ppp ppr ppt prb pre prf pri prk prn pro prp prr prt pt- ptb pte ptf pti ptk ptn pto ptp ptr ptt rbb rbe rbf rbi rbk rbn rbo rbp rbr rbt re- reb ree ref rei rek ren reo rep rer ret rfb rfe rff rfi rfk rfn rfo rfp rfr rft rib rie rif rii rik rin rio rip rir rit rkb rke rkf rkk rko rkp rkt rnb rni rnn rno rnp rnr rnt rob roe rof roi rok ron roo rop ror rot rpb rpe rpf rpi rpk rpn rpo rpp rpr rpt rrb rrf rri rrk rrn rrp rrr rrt rtb rte rtf rti rtk rtn rto rtp rtr rtt tbb tbe tbf tbi tbk tbn tbo tbp tbr tbt te- teb tee tef tei tek ten teo tep ter tet tfb tfe tff tfi tfk tfn tfo tfp tfr tft tib tie tif tii tik tin tio tip tir tit tkb tke tkk tko tkp tkr tkt tnb tne tnf tni tnk tnn tno tnp tnr tnt to- tob toe tof toi tok ton too top tor tot tpb tpe tpf tpi tpk tpn tpo tpp tpr tpt trb tre trf tri trk trn tro trp trr trt ttb tte ttf tti ttk ttn tto ttp ttr ttt