-er -up a-a a-b a-t aaa aab aad aae aap aar aat aau ab- aba abb abd abe abp abr abt abu ad- ada adb add ade adp adr adt adu aea aeb aed aee aep aer aet aeu ap- apa apb apd ape app apr apt apu ar- ara arb ard are arp arr art aru at- ata atb atd ate atp atr att atu au- aua aub aud aue aup aur aut b-p b-u baa bab bad bae bap bar bat bau bba bbb bbd bbe bbp bbr bbt bbu bda bdb bdd bde bdp bdr bdt bdu be- bea beb bed bee bep ber bet beu bpa bpb bpd bpe bpp bpr bpt bpu bra brb brd bre brp brr brt bru bta btb btd bte btp btr btt btu bua bub bud bue bup bur but buu daa dab dad dae dap dar dat dau dba dbb dbd dbe dbp dbr dbt dbu dda ddb ddd dde ddp ddr ddt ddu de- dea deb ded dee dep der det deu dpa dpb dpd dpe dpp dpr dpt dpu dra drb drd dre drp drr drt dru dta dtb dtd dte dtp dtr dtt dtu dua dub dud due dup dur dut eaa eab ead eae eap ear eat eau eba ebb ebd ebe ebp ebr ebt ebu ed- eda edb edd ede edp edr edt edu eea eeb eed eee eep eer eet ep- epa epb epd epe epp epr ept epu era erb erd ere erp err ert eru eta etb etd ete etp etr ett etu eu- eua eub eud eue eup eur eut p-p paa pab pad pae pap par pat pau pba pbb pbd pbe pbp pbr pbt pbu pda pdb pdd pde pdp pdr pdt pdu pea peb ped pee pep per pet peu ppa ppb ppd ppe ppp ppr ppt ppu pra prb prd pre prp prr prt pru pt- pta ptb ptd pte ptp ptr ptt ptu pua pub pud pue pup pur put puu ra- raa rab rad rae rap rar rat rau rba rbb rbd rbe rbp rbr rbt rbu rda rdb rdd rde rdp rdr rdt rdu re- rea reb red ree rep rer ret reu rpa rpb rpd rpe rpp rpr rpt rpu rra rrb rrd rrp rrr rrt rru rta rtb rtd rte rtp rtr rtt rtu rua rub rud rue rup rur rut ruu taa tab tad tae tap tar tat tau tba tbb tbd tbe tbp tbr tbt tbu tda tdb tdd tde tdp tdr tdt tdu te- tea teb ted tee tep ter tet teu tpa tpb tpd tpe tpp tpr tpt tpu tra trb trd tre trp trr trt tru tta ttb ttd tte ttp ttr ttt ttu tua tub tud tue tup tur tut tuu ua- uaa uab uad uae uap uar uat uau uba ubb ube ubp ubr ubt ubu uda udb udd ude udp udr udt udu uea ueb ued uee uep uer uet up- upa upb upd upe upp upr upt upu ur- ura urb urd ure urp urr urt uru uta utb utd ute utp utr utt utu uua uue uur uut uuu