-up a-a a-b a-c a-t aaa aab aac aae aan aap aat aau ab- aba abb abc abe abn abp abt abu ac- aca acb acc ace acn acp act acu aea aeb aec aee aen aep aet aeu an- ana anb anc ane ann anp ant anu ap- apa apb apc ape apn app apt apu at- ata atb atc ate atn atp att atu au- aua aub auc aue aun aup aut b-p b-u baa bab bac bae ban bap bat bau bba bbb bbc bbe bbn bbp bbt bbu bca bcb bcc bce bcn bcp bct bcu be- bea beb bec bee ben bep bet beu bna bnb bnc bne bnn bnp bnt bnu bpa bpb bpc bpe bpn bpp bpt bpu bta btb btc bte btn btp btt btu bua bub buc bue bun bup but buu c-- caa cab cac cae can cap cat cau cba cbb cbc cbe cbn cbp cbt cbu cca ccb ccc cce ccn ccp cct ccu ce- cea ceb cec cee cen cep cet ceu cn- cna cnb cnc cne cnn cnp cnt cnu cpa cpb cpc cpe cpn cpp cpt cpu cta ctb ctc cte ctn ctp ctt ctu cua cub cuc cue cun cup cut cuu eaa eab eac eae ean eap eat eau eba ebb ebc ebe ebn ebp ebt ebu ec- eca ecb ecc ece ecn ect ecu eea eeb eec eee een eep eet en- ena enb enc ene enn enp ent enu ep- epa epb epc epe epn epp ept epu eta etb etc ete etn etp ett etu eu- eua eub euc eue eun eup eut naa nab nac nae nan nap nat nau nba nbb nbc nbe nbn nbp nbt nbu nca ncb ncc nce ncn ncp nct ncu ne- nea neb nec nee nen nep net neu nna nnb nnc nne nnn nnp nnt nnu npa npb npc npe npn npp npt npu nta ntb ntc nte ntn ntp ntt ntu nua nub nuc nue nun nup nut nuu p-p paa pab pac pae pan pap pat pau pba pbb pbc pbe pbn pbp pbt pbu pca pcb pcc pce pcn pcp pct pcu pea peb pec pee pen pep pet peu pn- pna pnb pnc pne pnn pnp pnt pnu ppa ppb ppc ppe ppn ppp ppt ppu pt- pta ptb ptc pte ptn ptp ptt ptu pua pub puc pue pun pup put puu taa tab tac tae tan tap tat tau tba tbb tbc tbe tbn tbp tbt tbu tca tcb tcc tce tcn tcp tct tcu te- tea teb tec tee ten tep tet teu tna tnb tnc tne tnn tnp tnt tpa tpb tpc tpe tpn tpp tpt tpu tta ttb ttc tte ttn ttp ttt ttu tua tub tuc tue tun tup tut tuu ua- uaa uab uac uae uan uap uat uau uba ubb ubc ube ubn ubp ubt ubu uca ucb ucc uce ucn ucp uct ucu uea ueb uec uee uen uep uet un- una unb unc une unn unp unt unu up- upa upb upc upe upn upp upt upu uta utb utc ute utn utp utt utu uua uuc uue uun uut uuu