bbb bbd bbf bbl bbn bbr bbs bbt bdb bdd bdf bdl bdr bds bdt bfb bfd bff bfl bfn bfr bfs bft blb bld blf bll bln blr bls blt bnb bnd bnf bnl bnn bnr bns bnt brb brd brf brl brn brr brs brt bsb bsd bsf bsl bsn bsr bss bst btb btd btf btl btn btr bts btt dbb dbd dbf dbl dbn dbr dbs dbt ddb ddd ddf ddl ddn ddr dds ddt dfb dfd dff dfl dfn dfr dfs dft dl- dlb dld dlf dll dlr dls dlt dnb dnd dnf dnl dnn dnr dns dnt drb drd drl drn drr drs drt dsb dsd dsf dsl dsn dsr dss dst dtb dtd dtf dtl dtn dtr dts dtt fbb fbd fbf fbl fbn fbr fbs fbt fdb fdd fdf fdl fdn fdr fds fdt ffd fff ffl ffn ffr ffs fft flb fld flf fll fln flr fls flt fnb fnd fnf fnl fnn fnr fns fnt frb frd frf frl frn frr frs frt fsb fsd fsf fsl fsn fsr fss fst ftb ftd ftf ftl ftn ftr fts ftt lbb lbd lbf lbl lbr lbs lbt ldb ldd ldf ldl ldn ldr lds ldt lfb lfd lff lfl lfn lfr lfs lft llb lld llf lll lln llr lls llt lnb lnd lnl lnn lnr lns lnt lrb lrd lrf lrn lrr lrs lrt lsb lsd lsf lsl lsn lsr lss lst ltb ltd ltf ltl ltr lts ltt nbb nbd nbf nbl nbn nbr nbs nbt ndb ndd ndf ndl ndn ndr nds ndt nfb nfd nff nfl nfn nfr nfs nft nlb nld nlf nll nln nlr nls nlt nnb nnf nnl nnn nns nnt nrb nrd nrf nrl nrn nrr nrs nrt nsb nsd nsf nsl nsn nsr nss nst ntb ntd ntf ntn ntr nts ntt rbb rbd rbf rbl rbn rbr rbs rbt rdb rdd rdf rdl rdn rdr rds rdt rfb rfd rff rfl rfn rfr rfs rft rld rlf rll rln rlr rls rlt rnb rnd rnn rnr rns rnt rrb rrd rrf rrl rrn rrr rrs rrt rsb rsd rsf rsl rsn rsr rss rst rtb rtd rtf rtl rtn rtr rts rtt sbb sbd sbf sbl sbn sbr sbs sbt sdb sdd sdf sdl sdn sdr sds sdt sfb sfd sff sfl sfn sfr sfs sft slb sld slf sll sln slr sls slt snb snd snf snl snn snr sns snt sr- srb srd srf srl srn srr srs srt ss- ssb ssd ssf ssl ssn ssr sss sst stb std stf stl stn str sts stt tbb tbd tbf tbl tbn tbr tbs tbt tdb tdd tdf tdl tdn tdr tds tdt tfb tfd tff tfl tfn tfr tfs tft tld tlf tll tln tlr tls tlt tnb tnd tnf tnl tnn tnr tns tnt trb trd trf trl trn trr trs trt tsb tsd tsf tsl tsn tsr tss tst ttb ttd ttf ttl ttn ttr tts ttt