b-u bbb bbc bbe bbo bbs bbu bcb bcc bce bco bcs bcu bcv be- beb bec bee beo bes beu bev bob boc boe boo bos bou bov bsb bsc bse bso bss bsu bsv bub buc bue buo bus buu bvb bvc bve bvo bvs bvu bvv c-- cbb cbc cbe cbo cbs cbu cbv ccb ccc cce cco ccs ccu ccv ce- ceb cec cee ceo ces ceu cev co- cob coc coe coo cos cou cov csb csc cse cso css csu csv cub cuc cue cuo cus cuu cuv cvb cvc cve cvo cvs cvu cvv ebb ebc ebe ebo ebs ebu ebv ec- ecb ecc ece eco ecs ecu ecv eeb eec eee eeo ees eev eo- eob eoc eoe eoo eos eou es- esb esc ese eso ess esu esv eu- eub euc eue eus euv evb evc eve evo evs evv ob- obb obc obe obo obs obu obv oc- ocb occ oco ocs ocu ocv oeb oec oee oeo oes oo- oob ooc ooo oos oov os- osb osc ose oso oss osu osv ou- ouc oue ouo ous ov- ovb ovc ove ovo ovs ovv sbb sbc sbe sbo sbs sbu sbv scb scc sce sco scs scu scv se- seb sec see seo ses seu sev sob soc soe soo sos sou sov ss- ssb ssc sse sso sss ssu ssv sub suc sue suo sus suu suv svb svc sve svo svs svu svv ubb ubc ube ubo ubs ubu ubv ucb ucc uce uco ucs ucu ucv ueb uec uee ues uob uoc uoe uoo uos usb usc use uso uss usu usv uuc uue uus uuu uvb uvc uve uvo uvs uvu uvv v-e vbc vbo vbs vbv vcc vce vco vcs vcu veb vec vee veo ves veu vob voc voe voo vos vou vov vsb vsc vse vso vss vsu vsv vue vus vuv vvb vvc vvo vvs vvv