-th b-u bbb bbe bbh bbo bbs bbt bbu bbx be- beb bee beh beo bes bet beu bex bhb bhe bhh bho bhs bht bhu bhx bob boe boh boo bos bot bou box bsb bse bsh bso bss bst bsu bsx btb bte bth bto bts btt btu btx bub bue buh buo bus but buu bux bxb bxo bxx ebb ebe ebh ebo ebs ebt ebu ebx eeb eee eeo ees eet eex ehb ehe ehh eho ehs eht ehu eo- eob eoe eoh eoo eos eot eou es- esb ese esh eso ess est esu esx etb ete eth eto ets ett etu etx eu- eub eue eus eut eux ex- exe exh exo exs ext exu exx hbb hbe hbh hbo hbs hbt hbu hbx he- heb hee heh heo hes het heu hex hhb hhe hhh hho hhs hht hhu hob hoe hoh hoo hos hot hou hox hsb hse hsh hss hst hsu hsx htb hte hth hto hts htt htx hub hue huh huo hus hut huu hux ob- obb obe obh obo obs obt obu obx oeb oee oeh oeo oes oet oex ohe ohh oho ohs oht ohu oo- oob ooh ooo oos oot oox os- osb ose osh oso oss ost osu osx ot- otb ote oth oto ots ott otu ou- oue ouh ouo ous out ox- oxb oxo oxt oxx sbb sbe sbh sbo sbs sbt sbu sbx se- seb see seh seo ses set seu sex sh- shb she shh sho shs sht shu sob soe soh soo sos sot sou sox ss- ssb sse ssh sso sss sst ssu ssx stb ste sth sto sts stt stu stx sub sue suh suo sus sut suu sux sxs sxt sxu t-x tbb tbe tbh tbo tbs tbt tbu te- teb tee teh teo tes tet teu tex th- thb the thh tho ths tht thu thx to- tob toe toh too tos tot tou tox tsb tse tsh tso tss tst tsu tsx ttb tte tth tto tts ttt ttu ttx tub tue tuh tuo tus tut tuu tux txe txs txt txu ubb ube ubh ubo ubs ubt ubu ubx ueb uee ueh ues uet uhb uhe uhh uho uhs uht uhu uob uoe uoo uos uot uox usb use ush uso uss ust usu usx utb ute uth uto uts utt utu utx uue uus uut uuu uxb uxo uxt uxu xbe xbx xee xes xet xeu xex xht xoo xos xot xox xsb xss xst xts xtx xue xus xxo xxx