b-u bbb bbc bbd bbe bbh bbl bbn bbu bcb bcc bcd bce bch bcl bcn bcu bdb bdc bdd bde bdh bdl bdu be- beb bec bed bee beh bel ben beu bhb bhc bhd bhe bhh bhl bhu blb blc bld ble blh bll bln blu bnb bnc bnd bne bnl bnn bnu bub buc bud bue buh bul bun buu c-- cbb cbc cbd cbe cbh cbl cbn cbu ccb ccc ccd cce cch ccl ccn ccu cdb cdc cdd cde cdh cdl cdn cdu ce- ceb cec ced cee ceh cel cen ceu ch- chb chc chd che chh chl chn chu cl- clb clc cld cle clh cll cln clu cn- cnb cnc cnd cne cnh cnl cnn cnu cub cuc cud cue cuh cul cun cuu dbb dbc dbd dbe dbh dbl dbn dbu dcb dcc dcd dce dcl dcn dcu ddb ddc ddd dde ddh ddl ddn ddu de- deb dec ded dee deh del den deu dh- dhb dhc dhd dhe dhh dhl dhu dl- dlb dlc dld dle dlh dll dlu dnb dnc dnd dne dnh dnl dnn dub duc dud due duh dul dun ebb ebc ebd ebe ebh ebl ebn ebu ec- ecb ecc ecd ece ech ecl ecn ecu ed- edb edc edd ede edh edl edn edu eeb eec eed eee eel een ehb ehc ehd ehe ehh ehl ehn ehu elb elc eld ele elh ell eln elu en- enb enc end ene enh enl enn enu eu- eub euc eud eue eul eun hbb hbc hbd hbe hbh hbl hbn hbu hcb hcc hcd hce hch hcl hcn hdb hdc hdd hde hdh hdl hdn hdu he- heb hec hed hee heh hel hen heu hhb hhc hhd hhe hhh hhl hhn hhu hlb hlc hld hle hlh hll hln hlu hnb hnc hnd hne hnh hnl hnn hnu hub huc hud hue huh hul hun huu lbb lbc lbd lbe lbh lbl lbu lcb lcc lcd lce lch lcl lcn lcu ldb ldc ldd lde ldh ldl ldn ldu leb lec led lee leh lel len leu lhb lhc lhd lhh lhu llb llc lld lle lll lln llu lnb lnc lnd lne lnh lnl lnn lnu lub luc lud lue luh lul lun luu nbb nbc nbd nbe nbl nbn nbu ncb ncc ncd nce nch ncl ncn ncu ndb ndc ndd nde ndh ndl ndn ndu ne- neb nec ned nee neh nel nen neu nhb nhc nhd nhe nhh nhl nhn nhu nlb nlc nld nle nlh nll nln nlu nnb nnc nne nnh nnl nnn nnu nub nuc nud nue nuh nul nun nuu ubb ubc ube ubh ubl ubn ubu ucb ucc ucd uce uch ucl ucn ucu udb udc udd ude udl udn udu ueb uec ued uee ueh uel uen uhb uhc uhd uhe uhh uhl uhu ulb ulc uld ule ull uln ulu un- unb unc und une unh unl unn unu uuc uue uun uuu