b-u bbb bbc bbe bbm bbn bbo bbu bcb bcc bce bcm bcn bco bcu be- beb bec bee bem ben beo beu bmb bmc bme bmm bmn bmo bmu bnb bnc bne bnn bno bnu bob boc boe bom bon boo bou bub buc bue bum bun buo buu c-- cbb cbc cbe cbm cbn cbo cbu ccb ccc cce ccm ccn cco ccu ce- ceb cec cee cem cen ceo ceu cmb cmc cme cmm cmn cmo cmu cn- cnb cnc cne cnm cnn cno cnu co- cob coc coe com con coo cou cub cuc cue cum cun cuo cuu ebb ebc ebe ebm ebn ebo ebu ec- ecb ecc ece ecm ecn eco ecu eeb eec eee eem een eeo em- emb emc eme emm emn emo emu en- enb enc ene enm enn eno enu eo- eob eoc eoe eom eon eoo eou eu- eub euc eue eun m-o mbb mbc mbe mbm mbo mbu mc- mcb mcc mce mcm mcn mco mcu meb mec mee mem men meo meu mmb mmc mme mmm mmn mmo mmu mnb mnc mne mnm mnn mno mnu mob moc moe mom mon moo mou mub muc mue mum mun muu nbb nbc nbe nbm nbn nbo nbu ncb ncc nce ncm ncn nco ncu ne- neb nec nee nem nen neo neu nmb nmc nme nmm nmn nmo nmu nnb nnc nne nnm nnn nno nnu no- nob noc noe nom non noo nou nub nuc nue num nun nuo nuu ob- obb obc obe obm obn obo obu oc- ocb occ ocm ocn oco ocu oeb oec oee oem oen oeo om- omb omc ome omm omn omo omu on- onb onc one onn ono onu oo- oob ooc oom oon ooo ou- ouc oue oum oun ouo ubb ubc ube ubn ubo ubu ucb ucc uce ucm ucn uco ucu ueb uec uee uem uen um- umb umc ume umm umn umo umu un- unb unc une unm unn uno unu uob uoc uoe uom uon uoo uuc uue uum uun uuu