-er -ic b-u bbb bbc bbe bbi bbn bbo bbr bbu bcb bcc bce bci bcn bco bcr bcu be- beb bec bee bei ben beo ber beu bi- bib bic bie bii bin bio bir biu bnb bnc bne bni bnn bno bnr bnu bob boc boe boi bon boo bor bou brb bre bri brn bro brr bru bub buc bue bui bun buo bur buu c-- cbb cbc cbe cbi cbn cbo cbr cbu ccb ccc cce cci ccn cco ccr ccu ce- ceb cec cee cei cen ceo cer ceu ci- cib cic cie cii cin cio cir ciu cn- cnb cnc cne cni cnn cno cnr cnu co- cob coc coe coi con coo cor cou crb crc cre cri crn cro crr cru cub cuc cue cui cun cuo cur cuu ebb ebc ebe ebi ebn ebo ebr ebu ec- ecb ecc ece eci ecn eco ecr ecu eeb eec eee een eeo eer eib eic eie eii ein eio eir eiu en- enb enc ene eni enn eno enr enu eo- eob eoc eoe eoi eon eoo eor eou erb erc ere eri ern ero err eru eu- eub euc eue eui eun eur ibb ibc ibe ibi ibn ibo ibr ibu icb icc ice ici icn ico icr icu ie- iec iee iei ien ier iib iic iie iii iin iio iir iiu in- inb inc ine ini inn ino inr inu io- iob ioc ioe ioi ion ioo ior iou ir- irb irc ire iri irn iro irr iru iu- iub iuc iue iui iur n-i nbb nbc nbe nbi nbn nbo nbr nbu ncb ncc nce nci ncn nco ncr ncu ne- neb nec nee nei nen neo ner neu nib nic nie nii nin nio nir niu nnb nnc nne nni nnn nno nnu no- nob noc noe noi non noo nor nou nrb nrc nre nri nrn nro nrr nru nub nuc nue nui nun nuo nur nuu o-i ob- obb obc obe obi obn obo obr obu oc- ocb occ oci ocn oco ocr ocu oeb oec oee oei oen oeo oer oib oic oie oii oin oio oir oiu on- onb onc one oni onn ono onr onu oo- oob ooc ooi oon ooo oor or- orb orc ore ori orn oro orr oru ou- ouc oue oui oun ouo our rbb rbc rbe rbi rbn rbo rbr rbu rcb rcc rce rci rcn rco rcr rcu re- reb rec ree rei ren reo rer reu rib ric rie rii rin rio rir rnb rnc rni rnn rno rnr rnu rob roc roe roi ron roo ror rou rrb rrc rri rrn rrr rru rub ruc rue rui run ruo rur ruu ubb ubc ube ubi ubn ubo ubr ubu ucb ucc uce uci ucn uco ucr ucu ueb uec uee uei uen uer uib uic uie uii uin uio uir uiu un- unb unc une uni unn uno unr unu uob uoc uoe uon uoo uor ur- urb urc ure uri urn uro urr uru uuc uue uun uur uuu