-er b-u bbb bbd bbe bbr bbu bbw bdb bdd bde bdr bdu bdw bdz be- beb bed bee ber beu bew bez brb brd bre brr bru brw brz bub bud bue bur buu buw buz bwb bwd bwr bwu bzd bze bzr bzu bzz dbb dbd dbe dbr dbu dbz ddb ddd dde ddr ddu ddw ddz de- deb ded dee der deu dew dez drb drd dre drr dru drw drz dub dud due dur duz dwb dwe dwr dwu dww dzb dzd dze dzr dzu ebb ebd ebe ebr ebu ebw ed- edb edd ede edr edu edw eeb eed eee eer eew erb erd ere err eru erw erz eu- eub eud eue eur ewb ewd ewe ewr ewu eww eze ezr ezz rbb rbd rbe rbr rbu rbw rdb rdd rde rdr rdu re- reb red ree rer reu rew rez rrb rrd rrr rru rub rud rue rur ruu ruz rwb rwd rwe rwr rwu rzb rze ubb ube ubr ubu ubw udb udd ude udr udu ueb ued uee uer uew ur- urb urd ure urr uru urw urz uue uur uuu uwb uwe uwr uww uzb uzu wbb wbd wbe wbr wbw wbz wdb wdr wdu wdz web wed wee wer wew wez wr- wrd wre wrr wru wrw wub wud wue wur wuz wwd wwe wwu www wzu zbb zbr zbw zeb zed zee zer zez zub zud zur zuz zzr zzz