b-u bbb bbc bbe bbm bbo bbt bbu bcb bcc bce bcm bco bct bcu be- beb bec bee bem beo bet beu bmb bmc bme bmm bmo bmt bmu bob boc boe bom boo bot bou btb btc bte btm bto btt btu bub buc bue bum buo but buu c-- cbb cbc cbe cbm cbo cbt cbu ccb ccc cce ccm cco cct ccu ce- ceb cec cee cem ceo cet ceu cmb cmc cme cmm cmo cmt cmu co- cob coc coe com coo cot cou ctb ctc cte ctm cto ctt ctu cub cuc cue cum cuo cut cuu ebb ebc ebe ebm ebo ebt ebu ec- ecb ecc ece ecm eco ect ecu eeb eec eee eem eeo eet em- emb emc eme emm emo emt emu eo- eob eoc eoe eom eoo eot eou etb etc ete etm eto ett etu eu- eub euc eue eut m-o mbb mbc mbe mbm mbo mbt mbu mc- mcb mcc mce mcm mco mct mcu meb mec mee mem meo met meu mmb mmc mme mmm mmo mmt mmu mob moc moe mom moo mot mou mtb mtc mte mtm mto mtt mtu mub muc mue mum mut muu ob- obb obc obe obm obo obt obu oc- ocb occ ocm oco oct ocu oeb oec oee oem oeo oet om- omb omc ome omm omo omt omu oo- oob ooc oom ooo oot ot- otb otc ote otm oto ott otu ou- ouc oue oum ouo out tbb tbc tbe tbm tbo tbt tbu tcb tcc tce tcm tco tct tcu te- teb tec tee tem teo tet teu tmb tmc tme tmm tmo tmt tmu to- tob toc toe tom too tot tou ttb ttc tte ttm tto ttt ttu tub tuc tue tum tuo tut tuu ubb ubc ube ubo ubt ubu ucb ucc uce ucm uco uct ucu ueb uec uee uem uet um- umb umc ume umm umo umt umu uob uoc uoe uom uoo uot utb utc ute utm uto utt utu uuc uue uum uut uuu