-er b-u bbb bbc bbe bbh bbn bbo bbr bbu bcb bcc bce bch bcn bco bcr bcu be- beb bec bee beh ben beo ber beu bhb bhc bhe bhh bho bhr bhu bnb bnc bne bnn bno bnr bnu bob boc boe boh bon boo bor bou brb bre brh brn bro brr bru bub buc bue buh bun buo bur buu c-- cbb cbc cbe cbh cbn cbo cbr cbu ccb ccc cce cch ccn cco ccr ccu ce- ceb cec cee ceh cen ceo cer ceu ch- chb chc che chh chn cho chr chu cn- cnb cnc cne cnh cnn cno cnr cnu co- cob coc coe coh con coo cor cou crb crc cre crh crn cro crr cru cub cuc cue cuh cun cuo cur cuu ebb ebc ebe ebh ebn ebo ebr ebu ec- ecb ecc ece ech ecn eco ecr ecu eeb eec eee een eeo eer ehb ehc ehe ehh ehn eho ehr ehu en- enb enc ene enh enn eno enr enu eo- eob eoc eoe eoh eon eoo eor eou erb erc ere erh ern ero err eru eu- eub euc eue eun eur hbb hbc hbe hbh hbn hbo hbr hbu hcb hcc hce hch hcn hco hcr he- heb hec hee heh hen heo her heu hhb hhc hhe hhh hhn hho hhr hhu hnb hnc hne hnh hnn hno hnu hob hoc hoe hoh hon hoo hor hou hr- hrb hrc hre hrh hrn hro hrr hru hub huc hue huh hun huo hur huu nbb nbc nbe nbn nbo nbr nbu ncb ncc nce nch ncn nco ncr ncu ne- neb nec nee neh nen neo ner neu nhb nhc nhe nhh nhn nhr nhu nnb nnc nne nnh nnn nno nnu no- nob noc noe noh non noo nor nou nrb nrc nre nrn nro nrr nru nub nuc nue nuh nun nuo nur nuu ob- obb obc obe obh obn obo obr obu oc- ocb occ och ocn oco ocr ocu oeb oec oee oeh oen oeo oer ohc ohe ohh ohn oho ohr ohu on- onb onc one onh onn ono onr onu oo- oob ooc ooh oon ooo oor or- orb orc ore orh orn oro orr oru ou- ouc oue ouh oun ouo our rbb rbc rbe rbh rbn rbo rbr rbu rcb rcc rce rch rcn rco rcr rcu re- reb rec ree reh ren reo rer reu rh- rhb rhc rhe rhh rhn rho rhr rhu rnb rnc rnh rnn rno rnr rnu rob roc roe roh ron roo ror rou rrb rrc rrh rrn rrr rru rub ruc rue ruh run ruo rur ruu ubb ubc ube ubh ubn ubo ubr ubu ucb ucc uce uch ucn uco ucr ucu ueb uec uee ueh uen uer uhb uhc uhe uhh uho uhr uhu un- unb unc une unh unn uno unr unu uob uoc uoe uon uoo uor ur- urb urc ure urn uro urr uru uuc uue uun uur uuu