-er -up a-a a-b a-t aaa aab aae aao aap aar aat aau ab- aba abb abe abo abp abr abt abu aea aeb aee aeo aep aer aet aeu aoa aob aoe aoo aop aor aot aou ap- apa apb ape apo app apr apt apu ar- ara arb are aro arp arr art aru at- ata atb ate ato atp atr att atu au- aua aub aue auo aup aur aut b-p b-u baa bab bae bao bap bar bat bau bba bbb bbe bbo bbp bbr bbt bbu be- bea beb bee beo bep ber bet beu boa bob boe boo bop bor bot bou bpa bpb bpe bpo bpp bpr bpt bpu bra brb bre bro brp brr brt bru bta btb bte bto btp btr btt btu bua bub bue buo bup bur but buu eaa eab eae eao eap ear eat eau eba ebb ebe ebo ebp ebr ebt ebu eea eeb eee eeo eep eer eet eo- eoa eob eoe eoo eop eor eot eou ep- epa epb epe epo epp epr ept epu era erb ere ero erp err ert eru eta etb ete eto etp etr ett etu eu- eua eub eue eup eur eut oaa oab oae oao oap oar oat oau ob- oba obb obe obo obp obr obt obu oea oeb oee oeo oep oer oet oo- ooa oob ooo oop oor oot op- opa opb ope opo opp opr opt or- ora orb ore oro orp orr ort oru ot- ota otb ote oto otp otr ott otu ou- oua oue ouo oup our out p-p paa pab pae pao pap par pat pau pba pbb pbe pbo pbp pbr pbt pbu pea peb pee peo pep per pet peu poa pob poe poo pop por pot pou ppa ppb ppe ppo ppp ppr ppt ppu pra prb pre pro prp prr prt pru pt- pta ptb pte pto ptp ptr ptt ptu pua pub pue pup pur put puu ra- raa rab rae rao rap rar rat rau rba rbb rbe rbo rbp rbr rbt rbu re- rea reb ree reo rep rer ret reu roa rob roe roo rop ror rot rou rpa rpb rpe rpo rpp rpr rpt rpu rra rrb rrp rrr rrt rru rta rtb rte rto rtp rtr rtt rtu rua rub rue ruo rup rur rut ruu taa tab tae tao tap tar tat tau tba tbb tbe tbo tbp tbr tbt tbu te- tea teb tee teo tep ter tet teu to- toa tob toe too top tor tot tou tpa tpb tpe tpo tpp tpr tpt tpu tra trb tre tro trp trr trt tru tta ttb tte tto ttp ttr ttt ttu tua tub tue tuo tup tur tut tuu ua- uaa uab uae uao uap uar uat uau uba ubb ube ubo ubp ubr ubt ubu uea ueb uee uep uer uet uoa uob uoe uoo uop uor uot up- upa upb upe upo upp upr upt upu ur- ura urb ure uro urp urr urt uru uta utb ute uto utp utr utt utu uua uue uur uut uuu