-up a-a a-b a-c a-t aaa aab aac aao aap aas aat aau ab- aba abb abc abo abp abs abt abu ac- aca acb acc aco acp acs act acu aoa aob aoc aoo aop aos aot aou ap- apa apb apc apo app aps apt apu as- asa asb asc aso asp ass ast asu at- ata atb atc ato atp ats att atu au- aua aub auc auo aup aus aut b-p b-u baa bab bac bao bap bas bat bau bba bbb bbc bbo bbp bbs bbt bbu bca bcb bcc bco bcp bcs bct bcu boa bob boc boo bop bos bot bou bpa bpb bpc bpo bpp bps bpt bpu bsa bsb bsc bso bsp bss bst bsu bta btb btc bto btp bts btt btu bua bub buc buo bup bus but buu c-- caa cab cac cao cap cas cat cau cba cbb cbc cbo cbp cbs cbt cbu cca ccb ccc cco ccp ccs cct ccu co- coa cob coc coo cop cos cot cou cpa cpb cpc cpo cpp cps cpt cpu csa csb csc cso csp css cst csu cta ctb ctc cto ctp cts ctt ctu cua cub cuc cuo cup cus cut cuu oaa oab oac oao oap oas oat oau ob- oba obb obc obo obp obs obt obu oc- oca ocb occ oco ocp ocs oct ocu oo- ooa oob ooc ooo oop oos oot op- opa opb opc opo opp ops opt os- osa osb osc oso osp oss ost osu ot- ota otb otc oto otp ots ott otu ou- oua ouc ouo oup ous out p-p paa pab pac pao pap pas pat pau pba pbb pbc pbo pbp pbs pbt pbu pca pcb pcc pco pcp pcs pct pcu poa pob poc poo pop pos pot pou ppa ppb ppc ppo ppp pps ppt ppu ps- psa psb psc pso psp pss pst psu pt- pta ptb ptc pto ptp pts ptt ptu pua pub puc pup pus put puu saa sab sac sao sap sas sat sau sba sbb sbc sbo sbp sbs sbt sbu sca scb scc sco scp scs sct scu soa sob soc soo sop sos sot sou spa spb spc spo spp sps spt spu ss- ssa ssb ssc sso ssp sss sst ssu sta stb stc sto stp sts stt stu sua sub suc suo sup sus sut suu taa tab tac tao tap tas tat tau tba tbb tbc tbo tbp tbs tbt tbu tca tcb tcc tco tcp tcs tct tcu to- toa tob toc too top tos tot tou tpa tpb tpc tpo tpp tps tpt tpu tsa tsb tsc tso tsp tss tst tsu tta ttb ttc tto ttp tts ttt ttu tua tub tuc tuo tup tus tut tuu ua- uaa uab uac uao uap uas uat uau uba ubb ubc ubo ubp ubs ubt ubu uca ucb ucc uco ucp ucs uct ucu uoa uob uoc uoo uop uos uot up- upa upb upc upo upp ups upt upu usa usb usc uso usp uss ust usu uta utb utc uto utp uts utt utu uua uuc uus uut uuu