-er bbb bbe bbo bbr bbs bbw be- beb bee beo ber bes bew bez bob boe boo bor bos bow boz brb bre bro brr brs brw brz bsb bse bso bsr bss bsw bwb bwo bwr bws bze bzo bzr bzs bzz ebb ebe ebo ebr ebs ebw eeb eee eeo eer ees eew eo- eob eoe eoo eor eos eow erb ere ero err ers erw erz es- esb ese eso esr ess esw ewb ewe ewo ewr ews eww eze ezo ezr ezs ezz ob- obb obe obo obr obs obw oeb oee oeo oer oes oo- oob ooo oor oos oow or- orb ore oro orr ors orz os- osb ose oso osr oss osw owb owe owo ows oww oze ozo ozs ozw ozz rbb rbe rbo rbr rbs rbw re- reb ree reo rer res rew rez rob roe roo ror ros row roz rrb rrr rrs rsb rse rso rsr rss rsw rwb rwe rwr rws rzb rze rzo sbb sbe sbo sbr sbs sbw se- seb see seo ser ses sew sez sob soe soo sor sos sow soz sr- srb sre sro srr srs srw ss- ssb sse sso ssr sss ssw ssz swb swe swo swr sws sze szr wbb wbe wbo wbr wbs wbw wbz web wee weo wer wes wew wez wob woe woo wor wos wow woz wr- wre wro wrr wrs wrw wsb wse wso wsr wss wsw wwe wwo www zbb zbr zbs zbw zeb zee zeo zer zes zez zo- zob zoe zoo zor zos zow zro zrs zse zsz zws zzr zzs zzz