-th b-u bbb bbc bbe bbh bbo bbt bbu bcb bcc bce bch bco bct bcu be- beb bec bee beh beo bet beu bhb bhc bhe bhh bho bht bhu bob boc boe boh boo bot bou btb btc bte bth bto btt btu bub buc bue buh buo but buu c-- cbb cbc cbe cbh cbo cbt cbu ccb ccc cce cch cco cct ccu ce- ceb cec cee ceh ceo cet ceu ch- chb chc che chh cho cht chu co- cob coc coe coh coo cot cou ctb ctc cte cth cto ctt ctu cub cuc cue cuh cuo cut cuu ebb ebc ebe ebh ebo ebt ebu ec- ecb ecc ece ech eco ect ecu eeb eec eee eeo eet ehb ehc ehe ehh eho eht ehu eo- eob eoc eoe eoh eoo eot eou etb etc ete eth eto ett etu eu- eub euc eue eut hbb hbc hbe hbh hbo hbt hbu hcb hcc hce hch hco hct he- heb hec hee heh heo het heu hhb hhc hhe hhh hho hht hhu hob hoc hoe hoh hoo hot hou htb htc hte hth hto htt hub huc hue huh huo hut huu ob- obb obc obe obh obo obt obu oc- ocb occ och oco oct ocu oeb oec oee oeh oeo oet ohc ohe ohh oho oht ohu oo- oob ooc ooh ooo oot ot- otb otc ote oth oto ott otu ou- ouc oue ouh ouo out tbb tbc tbe tbh tbo tbt tbu tcb tcc tce tch tco tct tcu te- teb tec tee teh teo tet teu th- thb thc the thh tho tht thu to- tob toc toe toh too tot tou ttb ttc tte tth tto ttt ttu tub tuc tue tuh tuo tut tuu ubb ubc ube ubh ubo ubt ubu ucb ucc uce uch uco uct ucu ueb uec uee ueh uet uhb uhc uhe uhh uho uht uhu uob uoc uoe uoo uot utb utc ute uth uto utt utu uuc uue uut uuu