-er -ic b-u bbb bbc bbe bbf bbg bbi bbk bbn bbo bbr bbu bcb bcc bce bcf bcg bci bck bcn bco bcr bcu be- beb bec bee bef beg bei bek ben beo ber beu bfb bfc bfe bff bfg bfi bfn bfo bfr bfu bgb bgc bge bgf bgg bgi bgk bgn bgo bgr bgu bi- bib bic bie bif big bii bik bin bio bir biu bkb bkc bke bkf bkg bkk bkn bko bkr bnb bnc bne bnf bng bni bnk bnn bno bnr bnu bob boc boe bof bog boi bok bon boo bor bou brb bre brf brg bri brk brn bro brr bru bub buc bue buf bug bui buk bun buo bur buu c-- cbb cbc cbe cbf cbg cbi cbk cbn cbo cbr cbu ccb ccc cce ccf ccg cci cck ccn cco ccr ccu ce- ceb cec cee cef ceg cei cek cen ceo cer ceu cfb cfc cfe cff cfg cfi cfk cfn cfo cfr cfu cgb cgc cge cgg cgi cgn cgo cgr cgu ci- cib cic cie cif cig cii cik cin cio cir ciu ckb ckc cki cko cn- cnb cnc cne cnf cng cni cnn cno cnr cnu co- cob coc coe cof cog coi cok con coo cor cou crb crc cre crf crg cri crk crn cro crr cru cub cuc cue cuf cug cui cuk cun cuo cur cuu ebb ebc ebe ebf ebg ebi ebk ebn ebo ebr ebu ec- ecb ecc ece ecf ecg eci eck ecn eco ecr ecu eeb eec eee eef eeg eek een eeo eer ef- efb efc efe eff efg efi efo efr egb egc ege egf egg egi egn ego egr egu eib eic eie eif eig eii eik ein eio eir eiu ekb ekc eke ekf ekg eki eko ekr eku en- enb enc ene enf eng eni enk enn eno enr enu eo- eob eoc eoe eof eog eoi eok eon eoo eor eou erb erc ere erf erg eri erk ern ero err eru eu- eub euc eue euf eug eui eun eur fbb fbc fbe fbf fbg fbi fbk fbn fbo fbr fbu fcb fcc fce fcf fcg fci fck fcn fco fcr fcu feb fec fee fef feg fei fek fen feo fer feu ffc ffe fff ffg ffi ffk ffn ffo ffr ffu fgb fgc fge fgf fgg fgi fgn fgr fib fic fie fif fig fii fik fin fir fiu fkb fkc fkf fkg fki fkk fnb fnc fne fnf fng fni fnk fnn fnr fnu fob foc foe fof fog foi fok fon foo for fou frb frc fre frf frg fri frk frn fro frr fru fub fue fuf fug fui fuk fun fuo fur fuu gbc gbe gbf gbg gbi gbk gbn gbo gbr gbu gcb gcc gce gcf gcg gci gck gcn gco gcr gcu ge- geb gec gee gef geg gei gek gen geo ger geu gfb gfc gfe gff gfi gfk gfo gfr ggb ggc ggg ggi ggn ggo ggr ggu gib gic gie gif gig gii gik gin gio gir giu gkb gkn gko gnb gnc gne gnf gni gnn gno gnr gnu gob goc goe gof gog goi gok gon goo gor gou grb grc gre grf grg gri grk grn gro grr gru gu- gub guc gue guf gug gui guk gun guo gur guu i-f ibb ibc ibe ibf ibg ibi ibk ibn ibo ibr ibu icb icc ice icf icg ici ick icn ico icr icu ie- iec iee ief ieg iei iek ien ier ifb ifc ife iff ifg ifi ifn ifo ifr ifu igb igc ige igf igg igi igk ign igo igr igu iib iic iie iif iii iin iio iir iiu ikb ikc ike ikf iki ikk iko ikr iku in- inb inc ine inf ing ini ink inn ino inr inu io- iob ioc ioe iof iog ioi ion ioo ior iou ir- irb irc ire irf irg iri irk irn iro irr iru iu- iub iuc iue iug iui iur kbb kbc kbe kbf kbi kbk kbn kbo kbr kbu kcb kcc kce kcg kci kck kcn kcr kcu ke- keb kec kee kef keg kei kek ken keo ker kfc kff kfg kfi kfo kfu kgb kgc kgf kgi kgo kgu kib kic kie kif kig kii kik kin kio kir kiu kkb kkc kke kki kkk kkn kkr kku kn- knc kne knf kng kni knk knn kno knr knu kob koc koe kof kog koi kok kon koo kor kou krc krf krg kri krk krn kro krr kru kub kuc kue kug kui kuk kun kur kuu n-i nbb nbc nbe nbf nbg nbi nbk nbn nbo nbr nbu ncb ncc nce ncf ncg nci nck ncn nco ncr ncu ne- neb nec nee nef neg nei nek nen neo ner neu nfb nfc nfe nff nfi nfk nfn nfo nfr nfu ngb ngc nge ngf ngg ngi ngk ngn ngo ngu nib nic nie nif nig nii nik nin nio nir niu nkc nke nkf nki nkk nkn nko nkr nku nnb nnc nne nnf nng nni nnk nnn nno nnu no- nob noc noe nof nog noi nok non noo nor nou nrb nrc nre nrf nrg nri nrk nrn nro nrr nru nub nuc nue nug nui nuk nun nuo nur nuu o-i ob- obb obc obe obf obg obi obk obn obo obr obu oc- ocb occ ocf ocg oci ock ocn oco ocr ocu oeb oec oee oef oeg oei oen oeo oer of- ofb ofc ofe off ofg ofi ofn ofo ofr ofu ogc oge ogf ogg ogi ogn ogo oib oic oie oif oii oik oin oio oir oiu okb okc oke okg oki okk oko okr oku on- onb onc one onf ong oni onk onn ono onr onu oo- oob ooc oof oog ooi ook oon ooo oor or- orb orc ore orf org ori ork