-er -th bbb bbe bbh bbi bbo bbr bbs bbt be- beb bee beh bei beo ber bes bet bhb bhe bhh bhi bho bhr bhs bht bi- bib bie bih bii bio bir bis bit bob boe boh boi boo bor bos bot brb bre brh bri bro brr brs brt bsb bse bsh bsi bso bsr bss bst btb bte bth bti bto btr bts btt ebb ebe ebh ebi ebo ebr ebs ebt eeb eee eeo eer ees eet ehb ehe ehh ehi eho ehr ehs eht eib eie eii eio eir eis eit eo- eob eoe eoh eoi eoo eor eos eot erb ere erh eri ero err ers ert es- esb ese esh esi eso esr ess est etb ete eth eti eto etr ets ett h-i hbb hbe hbh hbi hbo hbr hbs hbt he- heb hee heh hei heo her hes het hhb hhe hhh hhi hho hhr hhs hht hib hie hih hii hio hir his hit hob hoe hoh hoi hoo hor hos hot hr- hrb hre hrh hri hro hrr hrs hrt hsb hse hsh hsi hsr hss hst htb hte hth hti hto htr hts htt ibb ibe ibh ibi ibo ibr ibs ibt ie- iee iei ier ies iet ihb ihe ihh ihi iho ihr ihs iht iib iie iih iii iio iir iis iit io- iob ioe ioh ioi ioo ior ios iot ir- irb ire iri iro irr irs irt is- isb ise ish isi iso isr iss ist itb ite ith iti ito its itt o-i ob- obb obe obh obi obo obr obs obt oeb oee oeh oei oeo oer oes oet ohe ohh ohi oho ohr ohs oht oib oie oii oio oir ois oit oo- oob ooh ooi ooo oor oos oot or- orb ore orh ori oro orr ors ort os- osb ose osh osi oso osr oss ost ot- otb ote oth oti oto otr ots ott rbb rbe rbh rbi rbo rbr rbs rbt re- reb ree reh rei reo rer res ret rh- rhb rhe rhh rhi rho rhr rhs rht rib rie rih rii rio rir ris rit rob roe roh roi roo ror ros rot rrb rrh rri rrr rrs rrt rsb rse rsh rsi rso rsr rss rst rtb rte rti rto rtr rts rtt sbb sbe sbh sbi sbo sbr sbs sbt se- seb see seh sei seo ser ses set sh- shb she shh shi sho shr shs sht sib sie sih sii sio sir sis sit sob soe soh soi soo sor sos sot sr- srb sre srh sri sro srr srs srt ss- ssb sse ssh ssi sso ssr sss sst stb ste sth sti sto str sts stt tbb tbe tbh tbi tbo tbr tbs tbt te- teb tee teh tei teo ter tes tet th- thb the thh thi tho thr ths tht tib tie tih tii tio tir tis tit to- tob toe toh toi too tor tos tot trb tre trh tri tro trr trs trt tsb tse tsh tsi tso tsr tss tst ttb tte tth tti tto ttr tts ttt