-up a-a a-b a-c a-t aaa aab aac aak aap aas aat aau ab- aba abb abc abk abp abs abt abu ac- aca acb acc ack acp acs act acu aka akb akc akk akp aks aku ap- apa apb apc apk app aps apt apu as- asa asb asc ask asp ass ast asu at- ata atb atc atp ats att atu au- aua aub auc auk aup aus aut b-p b-u baa bab bac bak bap bas bat bau bba bbb bbc bbk bbp bbs bbt bbu bca bcb bcc bck bcp bcs bct bcu bka bkb bkc bkk bkp bks bkt bpa bpb bpc bpp bps bpt bpu bsa bsb bsc bsk bsp bss bst bsu bta btb btc btk btp bts btt btu bua bub buc buk bup bus but buu c-- caa cab cac cak cap cas cat cau cba cbb cbc cbk cbp cbs cbt cbu cca ccb ccc cck ccp ccs cct ccu cka ckb ckc cks ckt cpa cpb cpc cpk cpp cps cpt cpu csa csb csc csk csp css cst csu cta ctb ctc ctk ctp cts ctt ctu cua cub cuc cuk cup cus cut cuu k-t ka- kaa kab kac kak kap kas kat kau kba kbb kbc kbk kbp kbs kbu kca kcb kcc kck kcp kcs kct kcu kkb kkc kkk kkp kks kkt kku kpa kpc kpk kpp kps kpt kpu ksa ksb ksc ksk ksp kss kst ksu kta ktb ktc ktk ktp kts ktt ktu kub kuc kuk kup kus kut kuu p-p paa pab pac pak pap pas pat pau pba pbb pbc pbk pbp pbs pbt pbu pca pcb pcc pck pcp pcs pct pcu pka pkb pkc pkp pks pkt pku ppa ppb ppc ppk ppp pps ppt ppu ps- psa psb psc psk psp pss pst psu pt- pta ptb ptc ptk ptp pts ptt ptu pua pub puc puk pup pus put puu saa sab sac sak sap sas sat sau sba sbb sbc sbk sbp sbs sbt sbu sca scb scc sck scp scs sct scu sk- ska skb skc skk skp sks skt sku spa spb spc spk spp sps spt spu ss- ssa ssb ssc ssk ssp sss sst ssu sta stb stc stk stp sts stt stu sua sub suc suk sup sus sut suu taa tab tac tak tap tas tat tau tba tbb tbc tbk tbp tbs tbt tbu tca tcb tcc tck tcp tcs tct tcu tka tkb tkc tkk tkp tks tkt tpa tpb tpc tpk tpp tps tpt tpu tsa tsb tsc tsk tsp tss tst tsu tta ttb ttc ttk ttp tts ttt ttu tua tub tuc tuk tup tus tut tuu ua- uaa uab uac uak uap uas uat uau uba ubb ubc ubk ubp ubs ubt ubu uca ucb ucc uck ucp ucs uct ucu uka ukb ukc ukk ukp uku up- upa upb upc upk upp ups upt upu usa usb usc usk usp uss ust usu uta utb utc utk utp uts utt utu uua uuc uus uut uuu