-er b-u bbb bbc bbe bbn bbo bbr bbt bbu bcb bcc bce bcn bco bcr bct bcu be- beb bec bee ben beo ber bet beu bnb bnc bne bnn bno bnr bnt bnu bob boc boe bon boo bor bot bou brb bre brn bro brr brt bru btb btc bte btn bto btr btt btu bub buc bue bun buo bur but buu c-- cbb cbc cbe cbn cbo cbr cbt cbu ccb ccc cce ccn cco ccr cct ccu ce- ceb cec cee cen ceo cer cet ceu cn- cnb cnc cne cnn cno cnr cnt cnu co- cob coc coe con coo cor cot cou crb crc cre crn cro crr crt cru ctb ctc cte ctn cto ctr ctt ctu cub cuc cue cun cuo cur cut cuu ebb ebc ebe ebn ebo ebr ebt ebu ec- ecb ecc ece ecn eco ecr ect ecu eeb eec eee een eeo eer eet en- enb enc ene enn eno enr ent enu eo- eob eoc eoe eon eoo eor eot eou erb erc ere ern ero err ert eru etb etc ete etn eto etr ett etu eu- eub euc eue eun eur eut nbb nbc nbe nbn nbo nbr nbt nbu ncb ncc nce ncn nco ncr nct ncu ne- neb nec nee nen neo ner net neu nnb nnc nne nnn nno nnt nnu no- nob noc noe non noo nor not nou nrb nrc nre nrn nro nrr nrt nru ntb ntc nte ntn nto ntr ntt ntu nub nuc nue nun nuo nur nut nuu ob- obb obc obe obn obo obr obt obu oc- ocb occ ocn oco ocr oct ocu oeb oec oee oen oeo oer oet on- onb onc one onn ono onr ont onu oo- oob ooc oon ooo oor oot or- orb orc ore orn oro orr ort oru ot- otb otc ote otn oto otr ott otu ou- ouc oue oun ouo our out rbb rbc rbe rbn rbo rbr rbt rbu rcb rcc rce rcn rco rcr rct rcu re- reb rec ree ren reo rer ret reu rnb rnc rnn rno rnr rnt rnu rob roc roe ron roo ror rot rou rrb rrc rrn rrr rrt rru rtb rtc rte rtn rto rtr rtt rtu rub ruc rue run ruo rur rut ruu tbb tbc tbe tbn tbo tbr tbt tbu tcb tcc tce tcn tco tcr tct tcu te- teb tec tee ten teo ter tet teu tnb tnc tne tnn tno tnr tnt to- tob toc toe ton too tor tot tou trb trc tre trn tro trr trt tru ttb ttc tte ttn tto ttr ttt ttu tub tuc tue tun tuo tur tut tuu ubb ubc ube ubn ubo ubr ubt ubu ucb ucc uce ucn uco ucr uct ucu ueb uec uee uen uer uet un- unb unc une unn uno unr unt unu uob uoc uoe uon uoo uor uot ur- urb urc ure urn uro urr urt uru utb utc ute utn uto utr utt utu uuc uue uun uur uut uuu