-er -ic b-u bbb bbc bbe bbi bbn bbr bbt bbu bcb bcc bce bci bcn bcr bct bcu be- beb bec bee bei ben ber bet beu bi- bib bic bie bii bin bir bit biu bnb bnc bne bni bnn bnr bnt bnu brb bre bri brn brr brt bru btb btc bte bti btn btr btt btu bub buc bue bui bun bur but buu c-- cbb cbc cbe cbi cbn cbr cbt cbu ccb ccc cce cci ccn ccr cct ccu ce- ceb cec cee cei cen cer cet ceu ci- cib cic cie cii cin cir cit ciu cn- cnb cnc cne cni cnn cnr cnt cnu crb crc cre cri crn crr crt cru ctb ctc cte cti ctn ctr ctt ctu cub cuc cue cui cun cur cut cuu ebb ebc ebe ebi ebn ebr ebt ebu ec- ecb ecc ece eci ecn ecr ect ecu eeb eec eee een eer eet eib eic eie eii ein eir eit eiu en- enb enc ene eni enn enr ent enu erb erc ere eri ern err ert eru etb etc ete eti etn etr ett etu eu- eub euc eue eui eun eur eut ibb ibc ibe ibi ibn ibr ibt ibu icb icc ice ici icn icr ict icu ie- iec iee iei ien ier iet iib iic iie iii iin iir iit iiu in- inb inc ine ini inn inr int inu ir- irb irc ire iri irn irr irt iru itb itc ite iti itn itt itu iu- iub iuc iue iui iur iut n-i nbb nbc nbe nbi nbn nbr nbt nbu ncb ncc nce nci ncn ncr nct ncu ne- neb nec nee nei nen ner net neu nib nic nie nii nin nir nit niu nnb nnc nne nni nnn nnt nnu nrb nrc nre nri nrn nrr nrt nru ntb ntc nte nti ntn ntr ntt ntu nub nuc nue nui nun nur nut nuu rbb rbc rbe rbi rbn rbr rbt rbu rcb rcc rce rci rcn rcr rct rcu re- reb rec ree rei ren rer ret reu rib ric rie rii rin rir rit rnb rnc rni rnn rnr rnt rnu rrb rrc rri rrn rrr rrt rru rtb rtc rte rti rtn rtr rtt rtu rub ruc rue rui run rur rut ruu tbb tbc tbe tbi tbn tbr tbt tbu tcb tcc tce tci tcn tcr tct tcu te- teb tec tee tei ten ter tet teu tib tic tie tii tin tir tit tiu tnb tnc tne tni tnn tnr tnt trb trc tre tri trn trr trt tru ttb ttc tte tti ttn ttr ttt ttu tub tuc tue tui tun tur tut tuu ubb ubc ube ubi ubn ubr ubt ubu ucb ucc uce uci ucn ucr uct ucu ueb uec uee uei uen uer uet uib uic uie uii uin uir uit uiu un- unb unc une uni unn unr unt unu ur- urb urc ure uri urn urr urt uru utb utc ute uti utn utr utt utu uuc uue uun uur uut uuu