-er b-u bbb bbc bbe bbf bbn bbo bbr bbu bcb bcc bce bcf bcn bco bcr bcu be- beb bec bee bef ben beo ber beu bfb bfc bfe bff bfn bfo bfr bfu bnb bnc bne bnf bnn bno bnr bnu bob boc boe bof bon boo bor bou brb bre brf brn bro brr bru bub buc bue buf bun buo bur buu c-- cbb cbc cbe cbf cbn cbo cbr cbu ccb ccc cce ccf ccn cco ccr ccu ce- ceb cec cee cef cen ceo cer ceu cfb cfc cfe cff cfn cfo cfr cfu cn- cnb cnc cne cnf cnn cno cnr cnu co- cob coc coe cof con coo cor cou crb crc cre crf crn cro crr cru cub cuc cue cuf cun cuo cur cuu ebb ebc ebe ebf ebn ebo ebr ebu ec- ecb ecc ece ecf ecn eco ecr ecu eeb eec eee eef een eeo eer ef- efb efc efe eff efo efr en- enb enc ene enf enn eno enr enu eo- eob eoc eoe eof eon eoo eor eou erb erc ere erf ern ero err eru eu- eub euc eue euf eun eur fbb fbc fbe fbf fbn fbo fbr fbu fcb fcc fce fcf fcn fco fcr fcu feb fec fee fef fen feo fer feu ffc ffe fff ffn ffo ffr ffu fnb fnc fne fnf fnn fnr fnu fob foc foe fof fon foo for fou frb frc fre frf frn fro frr fru fub fue fuf fun fuo fur fuu nbb nbc nbe nbf nbn nbo nbr nbu ncb ncc nce ncf ncn nco ncr ncu ne- neb nec nee nef nen neo ner neu nfb nfc nfe nff nfn nfo nfr nfu nnb nnc nne nnf nnn nno nnu no- nob noc noe nof non noo nor nou nrb nrc nre nrf nrn nro nrr nru nub nuc nue nun nuo nur nuu ob- obb obc obe obf obn obo obr obu oc- ocb occ ocf ocn oco ocr ocu oeb oec oee oef oen oeo oer of- ofb ofc ofe off ofn ofo ofr ofu on- onb onc one onf onn ono onr onu oo- oob ooc oof oon ooo oor or- orb orc ore orf orn oro orr oru ou- ouc oue ouf oun ouo our rbb rbc rbe rbf rbn rbo rbr rbu rcb rcc rce rcf rcn rco rcr rcu re- reb rec ree ref ren reo rer reu rfb rfc rfe rff rfn rfo rfr rfu rnb rnc rnn rno rnr rnu rob roc roe rof ron roo ror rou rrb rrc rrf rrn rrr rru rub ruc rue ruf run ruo rur ruu ubb ubc ube ubf ubn ubo ubr ubu ucb ucc uce ucf ucn uco ucr ucu ueb uec uee uef uen uer ufc ufe uff ufn ufo ufr ufu un- unb unc une unf unn uno unr unu uob uoc uoe uon uoo uor ur- urb urc ure urf urn uro urr uru uuc uue uun uur uuu