-er -th b-u bbb bbe bbh bbo bbr bbs bbt bbu bbx be- beb bee beh beo ber bes bet beu bex bhb bhe bhh bho bhr bhs bht bhu bhx bob boe boh boo bor bos bot bou box brb bre brh bro brr brs brt bru brx bsb bse bsh bso bsr bss bst bsu bsx btb bte bth bto btr bts btt btu btx bub bue buh buo bur bus but buu bux bxb bxo bxx ebb ebe ebh ebo ebr ebs ebt ebu ebx eeb eee eeo eer ees eet eex ehb ehe ehh eho ehr ehs eht ehu eo- eob eoe eoh eoo eor eos eot eou erb ere erh ero err ers ert eru es- esb ese esh eso esr ess est esu esx etb ete eth eto etr ets ett etu etx eu- eub eue eur eus eut eux ex- exe exh exo exr exs ext exu exx hbb hbe hbh hbo hbr hbs hbt hbu hbx he- heb hee heh heo her hes het heu hex hhb hhe hhh hho hhr hhs hht hhu hob hoe hoh hoo hor hos hot hou hox hr- hrb hre hrh hro hrr hrs hrt hru hsb hse hsh hsr hss hst hsu hsx htb hte hth hto htr hts htt htx hub hue huh huo hur hus hut huu hux ob- obb obe obh obo obr obs obt obu obx oeb oee oeh oeo oer oes oet oex ohe ohh oho ohr ohs oht ohu oo- oob ooh ooo oor oos oot oox or- orb ore orh oro orr ors ort oru orx os- osb ose osh oso osr oss ost osu osx ot- otb ote oth oto otr ots ott otu ou- oue ouh ouo our ous out ox- oxb oxo oxt oxx rbb rbe rbh rbo rbr rbs rbt rbu rbx re- reb ree reh reo rer res ret reu rex rh- rhb rhe rhh rho rhr rhs rht rhu rob roe roh roo ror ros rot rou rox rrb rrh rrr rrs rrt rru rsb rse rsh rso rsr rss rst rsu rsx rtb rte rto rtr rts rtt rtu rtx rub rue ruh ruo rur rus rut ruu rux rxr rxs sbb sbe sbh sbo sbr sbs sbt sbu sbx se- seb see seh seo ser ses set seu sex sh- shb she shh sho shr shs sht shu sob soe soh soo sor sos sot sou sox sr- srb sre srh sro srr srs srt srx ss- ssb sse ssh sso ssr sss sst ssu ssx stb ste sth sto str sts stt stu stx sub sue suh suo sur sus sut suu sux sxs sxt sxu t-x tbb tbe tbh tbo tbr tbs tbt tbu te- teb tee teh teo ter tes tet teu tex th- thb the thh tho thr ths tht thu thx to- tob toe toh too tor tos tot tou tox trb tre trh tro trr trs trt tru trx tsb tse tsh tso tsr tss tst tsu tsx ttb tte tth tto ttr tts ttt ttu ttx tub tue tuh tuo tur tus tut tuu tux txe txs txt txu ubb ube ubh ubo ubr ubs ubt ubu ubx ueb uee ueh uer ues uet uhb uhe uhh uho uhr uhs uht uhu uob uoe uoo uor uos uot uox ur- urb ure uro urr urs urt uru urx usb use ush uso usr uss ust usu usx utb ute uth uto utr uts utt utu utx uue uur uus uut uuu uxb uxo uxr uxt uxu xbe xbr xbx xee xer xes xet xeu xex xht xoo xor xos xot xox xrt xrx xsb xss xst xtr xts xtx xue xus xxo xxx