-er b-u bbb bbe bbo bbr bbs bbt bbu bbw be- beb bee beo ber bes bet beu bew bob boe boo bor bos bot bou bow brb bre bro brr brs brt bru brw bsb bse bso bsr bss bst bsu bsw btb bte bto btr bts btt btu btw bub bue buo bur bus but buu buw bwb bwo bwr bws bwu ebb ebe ebo ebr ebs ebt ebu ebw eeb eee eeo eer ees eet eew eo- eob eoe eoo eor eos eot eou eow erb ere ero err ers ert eru erw es- esb ese eso esr ess est esu esw etb ete eto etr ets ett etu etw eu- eub eue eur eus eut ewb ewe ewo ewr ews ewt ewu eww ob- obb obe obo obr obs obt obu obw oeb oee oeo oer oes oet oo- oob ooo oor oos oot oow or- orb ore oro orr ors ort oru os- osb ose oso osr oss ost osu osw ot- otb ote oto otr ots ott otu otw ou- oue ouo our ous out owb owe owo ows owt owu oww rbb rbe rbo rbr rbs rbt rbu rbw re- reb ree reo rer res ret reu rew rob roe roo ror ros rot rou row rrb rrr rrs rrt rru rsb rse rso rsr rss rst rsu rsw rtb rte rto rtr rts rtt rtu rtw rub rue ruo rur rus rut ruu rwb rwe rwr rws rwu sbb sbe sbo sbr sbs sbt sbu sbw se- seb see seo ser ses set seu sew sob soe soo sor sos sot sou sow sr- srb sre sro srr srs srt srw ss- ssb sse sso ssr sss sst ssu ssw stb ste sto str sts stt stu stw sub sue suo sur sus sut suu suw swb swe swo swr sws swt swu tbb tbe tbo tbr tbs tbt tbu te- teb tee teo ter tes tet teu tew to- tob toe too tor tos tot tou tow trb tre tro trr trs trt tru trw tsb tse tso tsr tss tst tsu tsw ttb tte tto ttr tts ttt ttu ttw tub tue tuo tur tus tut tuu twb twe two twr tws twt twu tww ubb ube ubo ubr ubs ubt ubu ubw ueb uee uer ues uet uew uob uoe uoo uor uos uot uow ur- urb ure uro urr urs urt uru urw usb use uso usr uss ust usu usw utb ute uto utr uts utt utu uue uur uus uut uuu uwb uwe uwr uws uww wbb wbe wbo wbr wbs wbt wbw web wee weo wer wes wet wew wob woe woo wor wos wot wou wow wr- wre wro wrr wrs wrt wru wrw wsb wse wso wsr wss wst wsu wsw wtb wto wtr wts wtt wtu wtw wub wue wuo wur wus wut wwe wwo wwt wwu www