b-u bbb bbc bbe bbf bbh bbk bbn bbo bbu bcb bcc bce bcf bch bck bcn bco bcu be- beb bec bee bef beh bek ben beo beu bfb bfc bfe bff bfh bfn bfo bfu bhb bhc bhe bhf bhh bhk bho bhu bkb bkc bke bkf bkk bkn bko bnb bnc bne bnf bnk bnn bno bnu bob boc boe bof boh bok bon boo bou bub buc bue buf buh buk bun buo buu c-- cbb cbc cbe cbf cbh cbk cbn cbo cbu ccb ccc cce ccf cch cck ccn cco ccu ce- ceb cec cee cef ceh cek cen ceo ceu cfb cfc cfe cff cfh cfk cfn cfo cfu ch- chb chc che chf chh chk chn cho chu ckb ckc ckh cko cn- cnb cnc cne cnf cnh cnn cno cnu co- cob coc coe cof coh cok con coo cou cub cuc cue cuf cuh cuk cun cuo cuu ebb ebc ebe ebf ebh ebk ebn ebo ebu ec- ecb ecc ece ecf ech eck ecn eco ecu eeb eec eee eef eek een eeo ef- efb efc efe eff efh efo ehb ehc ehe ehf ehh ehn eho ehu ekb ekc eke ekf ekh eko eku en- enb enc ene enf enh enk enn eno enu eo- eob eoc eoe eof eoh eok eon eoo eou eu- eub euc eue euf eun fbb fbc fbe fbf fbh fbk fbn fbo fbu fcb fcc fce fcf fck fcn fco fcu feb fec fee fef feh fek fen feo feu ffc ffe fff ffh ffk ffn ffo ffu fhb fhc fhe fhf fhh fhn fho fkb fkc fkf fkk fnb fnc fne fnf fnh fnk fnn fnu fob foc foe fof foh fok fon foo fou fub fue fuf fuk fun fuo fuu hbb hbc hbe hbf hbh hbk hbn hbo hbu hcb hcc hce hcf hch hck hcn hco he- heb hec hee hef heh hek hen heo heu hfb hfc hfe hff hfh hfk hfn hfo hfu hhb hhc hhe hhf hhh hhk hhn hho hhu hkb hkf hkh hkk hkn hko hku hnb hnc hne hnf hnh hnk hnn hno hnu hob hoc hoe hof hoh hok hon hoo hou hub huc hue huf huh huk hun huo huu kbb kbc kbe kbf kbh kbk kbn kbo kbu kcb kcc kce kch kck kcn kcu ke- keb kec kee kef keh kek ken keo kfc kff kfh kfo kfu khe khf khh khk khn kho khu kkb kkc kke kkh kkk kkn kku kn- knc kne knf knk knn kno knu kob koc koe kof koh kok kon koo kou kub kuc kue kuh kuk kun kuu nbb nbc nbe nbf nbk nbn nbo nbu ncb ncc nce ncf nch nck ncn nco ncu ne- neb nec nee nef neh nek nen neo neu nfb nfc nfe nff nfk nfn nfo nfu nhb nhc nhe nhf nhh nhk nhn nhu nkc nke nkf nkk nkn nko nku nnb nnc nne nnf nnh nnk nnn nno nnu no- nob noc noe nof noh nok non noo nou nub nuc nue nuh nuk nun nuo nuu ob- obb obc obe obf obh obk obn obo obu oc- ocb occ ocf och ock ocn oco ocu oeb oec oee oef oeh oen oeo of- ofb ofc ofe off ofn ofo ofu ohc ohe ohf ohh ohn oho ohu okb okc oke okk oko oku on- onb onc one onf onh onk onn ono onu oo- oob ooc oof ooh ook oon ooo ou- ouc oue ouf ouh ouk oun ouo ubb ubc ube ubf ubh ubk ubn ubo ubu ucb ucc uce ucf uch uck ucn uco ucu ueb uec uee uef ueh uen ufc ufe uff ufh ufn ufo ufu uhb uhc uhe uhf uhh uho uhu ukb ukc uke ukf ukk ukn uku un- unb unc une unf unh unk unn uno unu uob uoc uoe uok uon uoo uuc uue uun uuu