b-u bbb bbc bbe bbg bbk bbs bbt bbu bcb bcc bce bcg bck bcs bct bcu be- beb bec bee beg bek bes bet beu bgb bgc bge bgg bgk bgs bgt bgu bkb bkc bke bkg bkk bks bkt bsb bsc bse bsg bsk bss bst bsu btb btc bte btg btk bts btt btu bub buc bue bug buk bus but buu c-- cbb cbc cbe cbg cbk cbs cbt cbu ccb ccc cce ccg cck ccs cct ccu ce- ceb cec cee ceg cek ces cet ceu cgb cgc cge cgg cgs cgt cgu ckb ckc cks ckt csb csc cse csg csk css cst csu ctb ctc cte ctg ctk cts ctt ctu cub cuc cue cug cuk cus cut cuu ebb ebc ebe ebg ebk ebs ebt ebu ec- ecb ecc ece ecg eck ecs ect ecu eeb eec eee eeg eek ees eet egb egc ege egg egs egt egu ekb ekc eke ekg eks ekt eku es- esb esc ese esg esk ess est esu etb etc ete etg etk ets ett etu eu- eub euc eue eug eus eut gbc gbe gbg gbk gbs gbt gbu gcb gcc gce gcg gck gcs gct gcu ge- geb gec gee geg gek ges get geu ggb ggc ggg ggs ggt ggu gkb gks gkt gsb gsc gse gsg gsk gss gst gsu gtb gtc gte gtg gtk gts gtt gtu gu- gub guc gue gug guk gus gut guu k-t kbb kbc kbe kbk kbs kbu kcb kcc kce kcg kck kcs kct kcu ke- keb kec kee keg kek kes ket kgb kgc kgs kgu kkb kkc kke kkk kks kkt kku ksb ksc kse ksg ksk kss kst ksu ktb ktc kte ktg ktk kts ktt ktu kub kuc kue kug kuk kus kut kuu sbb sbc sbe sbg sbk sbs sbt sbu scb scc sce scg sck scs sct scu se- seb sec see seg sek ses set seu sgb sgc sge sgg sgk sgs sgt sgu sk- skb skc ske skg skk sks skt sku ss- ssb ssc sse ssg ssk sss sst ssu stb stc ste stg stk sts stt stu sub suc sue sug suk sus sut suu tbb tbc tbe tbg tbk tbs tbt tbu tcb tcc tce tcg tck tcs tct tcu te- teb tec tee teg tek tes tet teu tgb tgc tge tgg tgk tgs tgt tgu tkb tkc tke tkg tkk tks tkt tsb tsc tse tsg tsk tss tst tsu ttb ttc tte ttg ttk tts ttt ttu tub tuc tue tug tuk tus tut tuu ubb ubc ube ubg ubk ubs ubt ubu ucb ucc uce ucg uck ucs uct ucu ueb uec uee ueg ues uet ugb ugc uge ugg ugk ugs ugt ugu ukb ukc uke ukk uku usb usc use usg usk uss ust usu utb utc ute utk uts utt utu uuc uue uug uus uut uuu