bbb bbd bbi bbl bbr bbs bbt bdb bdd bdi bdl bdr bds bdt bi- bib bid bii bil bir bis bit blb bld bli bll blr bls blt brb brd bri brl brr brs brt bsb bsd bsi bsl bsr bss bst btb btd bti btl btr bts btt dbb dbd dbi dbl dbr dbs dbt ddb ddd ddi ddl ddr dds ddt di- dib did dii dil dir dis dit dl- dlb dld dli dll dlr dls dlt drb drd dri drl drr drs drt dsb dsd dsi dsl dsr dss dst dtb dtd dti dtl dtr dts dtt i-d ibb ibd ibi ibl ibr ibs ibt idb idd idi idl idr ids idt iib iid iii iil iir iis iit il- ilb ild ili ill ilr ils ilt ir- irb ird iri irl irr irs irt is- isb isd isi isl isr iss ist itb itd iti itl its itt lbb lbd lbi lbl lbr lbs lbt ldb ldd ldi ldl ldr lds ldt lib lid lii lil lir lis lit llb lld lli lll llr lls llt lrb lrd lri lrr lrs lrt lsb lsd lsi lsl lsr lss lst ltb ltd lti ltl ltr lts ltt rbb rbd rbi rbl rbr rbs rbt rdb rdd rdi rdl rdr rds rdt rib rid rii ril rir ris rit rld rli rll rlr rls rlt rrb rrd rri rrl rrr rrs rrt rsb rsd rsi rsl rsr rss rst rtb rtd rti rtl rtr rts rtt sbb sbd sbi sbl sbr sbs sbt sdb sdd sdi sdl sdr sds sdt sib sid sii sil sir sis sit slb sld sli sll slr sls slt sr- srb srd sri srl srr srs srt ss- ssb ssd ssi ssl ssr sss sst stb std sti stl str sts stt tbb tbd tbi tbl tbr tbs tbt tdb tdd tdi tdl tdr tds tdt tib tid tii til tir tis tit tld tli tll tlr tls tlt trb trd tri trl trr trs trt tsb tsd tsi tsl tsr tss tst ttb ttd tti ttl ttr tts ttt