-er -th bbb bbe bbh bbi bbr bbt bbx be- beb bee beh bei ber bet bex bhb bhe bhh bhi bhr bht bhx bi- bib bie bih bii bir bit bix brb bre brh bri brr brt brx btb bte bth bti btr btt btx bxb bxi bxx ebb ebe ebh ebi ebr ebt ebx eeb eee eer eet eex ehb ehe ehh ehi ehr eht eib eie eii eir eit eix erb ere erh eri err ert etb ete eth eti etr ett etx ex- exe exh exi exr ext exx h-i hbb hbe hbh hbi hbr hbt hbx he- heb hee heh hei her het hex hhb hhe hhh hhi hhr hht hib hie hih hii hir hit hix hr- hrb hre hrh hri hrr hrt htb hte hth hti htr htt htx ibb ibe ibh ibi ibr ibt ibx ie- iee iei ier iet iex ihb ihe ihh ihi ihr iht iib iie iih iii iir iit iix ir- irb ire iri irr irt irx itb ite ith iti itt itx ixe ixi rbb rbe rbh rbi rbr rbt rbx re- reb ree reh rei rer ret rex rh- rhb rhe rhh rhi rhr rht rib rie rih rii rir rit rix rrb rrh rri rrr rrt rtb rte rti rtr rtt rtx rxr t-x tbb tbe tbh tbi tbr tbt te- teb tee teh tei ter tet tex th- thb the thh thi thr tht thx tib tie tih tii tir tit tix trb tre trh tri trr trt trx ttb tte tth tti ttr ttt ttx txe txi txt xbe xbr xbx xee xer xet xex xht xie xii xit xix xrt xrx xti xtr xtx xxi xxx