-er b-u bbb bbd bbe bbi bbl bbr bbu bdb bdd bde bdi bdl bdr bdu bdz be- beb bed bee bei bel ber beu bez bi- bib bid bie bii bil bir biu biz blb bld ble bli bll blr blu blz brb brd bre bri brl brr bru brz bub bud bue bui bul bur buu buz bzd bze bzr bzu bzz dbb dbd dbe dbi dbl dbr dbu dbz ddb ddd dde ddi ddl ddr ddu ddz de- deb ded dee dei del der deu dez di- dib did die dii dil dir diu diz dl- dlb dld dle dli dll dlr dlu drb drd dre dri drl drr dru drz dub dud due dui dul dur duz dzb dzd dze dzi dzr dzu ebb ebd ebe ebi ebl ebr ebu ed- edb edd ede edi edl edr edu eeb eed eee eel eer eib eid eie eii eil eir eiu elb eld ele eli ell elr elu elz erb erd ere eri erl err eru erz eu- eub eud eue eui eul eur eze ezr ezz i-d ibb ibd ibe ibi ibl ibr ibu ibz idb idd ide idi idl idr idu ie- ied iee iei iel ier iib iid iie iii iil iir iiu il- ilb ild ile ili ill ilr ilu ilz ir- irb ird ire iri irl irr iru iu- iub iud iue iui iur iuz ize izi izu izz lbb lbd lbe lbi lbl lbr lbu ldb ldd lde ldi ldl ldr ldu leb led lee lei lel ler leu lez lib lid lie lii lil lir liu liz llb lld lle lli lll llr llu llz lrb lrd lri lrr lru lrz lub lud lue lui lul lur luu luz lzi lzr lzu rbb rbd rbe rbi rbl rbr rbu rdb rdd rde rdi rdl rdr rdu re- reb red ree rei rel rer reu rez rib rid rie rii ril rir riz rld rle rli rll rlr rlu rrb rrd rri rrl rrr rru rub rud rue rui rur ruu ruz rzb rze ubb ube ubi ubl ubr ubu udb udd ude udi udl udr udu ueb ued uee uei uel uer uib uid uie uii uil uir uiu ulb uld ule uli ull ulr ulu ur- urb urd ure uri url urr uru urz uue uur uuu uzb uzi uzu zbb zbl zbr zeb zed zee zel zer zez zib zid zie zil zir ziz zlr zrl zub zud zui zul zur zuz zzr zzz