-er b-u bbb bbd bbe bbi bbl bbr bbt bbu bdb bdd bde bdi bdl bdr bdt bdu be- beb bed bee bei bel ber bet beu bi- bib bid bie bii bil bir bit biu blb bld ble bli bll blr blt blu brb brd bre bri brl brr brt bru btb btd bte bti btl btr btt btu bub bud bue bui bul bur but buu dbb dbd dbe dbi dbl dbr dbt dbu ddb ddd dde ddi ddl ddr ddt ddu de- deb ded dee dei del der det deu di- dib did die dii dil dir dit diu dl- dlb dld dle dli dll dlr dlt dlu drb drd dre dri drl drr drt dru dtb dtd dte dti dtl dtr dtt dtu dub dud due dui dul dur dut ebb ebd ebe ebi ebl ebr ebt ebu ed- edb edd ede edi edl edr edt edu eeb eed eee eel eer eet eib eid eie eii eil eir eit eiu elb eld ele eli ell elr elt elu erb erd ere eri erl err ert eru etb etd ete eti etl etr ett etu eu- eub eud eue eui eul eur eut i-d ibb ibd ibe ibi ibl ibr ibt ibu idb idd ide idi idl idr idt idu ie- ied iee iei iel ier iet iib iid iie iii iil iir iit iiu il- ilb ild ile ili ill ilr ilt ilu ir- irb ird ire iri irl irr irt iru itb itd ite iti itl itt itu iu- iub iud iue iui iur iut lbb lbd lbe lbi lbl lbr lbt lbu ldb ldd lde ldi ldl ldr ldt ldu leb led lee lei lel ler let leu lib lid lie lii lil lir lit liu llb lld lle lli lll llr llt llu lrb lrd lri lrr lrt lru ltb ltd lte lti ltl ltr ltt ltu lub lud lue lui lul lur lut luu rbb rbd rbe rbi rbl rbr rbt rbu rdb rdd rde rdi rdl rdr rdt rdu re- reb red ree rei rel rer ret reu rib rid rie rii ril rir rit rld rle rli rll rlr rlt rlu rrb rrd rri rrl rrr rrt rru rtb rtd rte rti rtl rtr rtt rtu rub rud rue rui rur rut ruu tbb tbd tbe tbi tbl tbr tbt tbu tdb tdd tde tdi tdl tdr tdt tdu te- teb ted tee tei tel ter tet teu tib tid tie tii til tir tit tiu tld tle tli tll tlr tlt tlu trb trd tre tri trl trr trt tru ttb ttd tte tti ttl ttr ttt ttu tub tud tue tui tul tur tut tuu ubb ube ubi ubl ubr ubt ubu udb udd ude udi udl udr udt udu ueb ued uee uei uel uer uet uib uid uie uii uil uir uit uiu ulb uld ule uli ull ulr ult ulu ur- urb urd ure uri url urr urt uru utb utd ute uti utl utr utt utu uue uur uut uuu