-ly bbb bbi bbl bbr bbs bbt bby bi- bib bii bil bir bis bit biy blb bli bll blr bls blt bly brb bri brl brr brs brt bry bsb bsi bsl bsr bss bst bsy btb bti btl btr bts btt bty by- byi byl byr bys byt ibb ibi ibl ibr ibs ibt iby iib iii iil iir iis iit il- ilb ili ill ilr ils ilt ily ir- irb iri irl irr irs irt iry is- isb isi isl isr iss ist isy itb iti itl its itt ity iyr iys iyt iyy lbb lbi lbl lbr lbs lbt lib lii lil lir lis lit llb lli lll llr lls llt lly lrb lri lrr lrs lrt lry lsb lsi lsl lsr lss lst ltb lti ltl ltr lts ltt lyl lyr lys lyt rbb rbi rbl rbr rbs rbt rib rii ril rir ris rit riy rli rll rlr rls rlt rly rrb rri rrl rrr rrs rrt rsb rsi rsl rsr rss rst rtb rti rtl rtr rts rtt rty ry- ryr rys ryy sbb sbi sbl sbr sbs sbt sby sib sii sil sir sis sit slb sli sll slr sls slt sly sr- srb sri srl srr srs srt sry ss- ssb ssi ssl ssr sss sst stb sti stl str sts stt sty sy- syb syi syl syr sys syt tbb tbi tbl tbr tbs tbt tib tii til tir tis tit tiy tli tll tlr tls tlt trb tri trl trr trs trt try tsb tsi tsl tsr tss tst tsy ttb tti ttl ttr tts ttt tty tyl tyr tys tyt ybi ybl ybr ybs yby yii yir yis yit yli yll ylr yls ylt yly yrs yrt ysb ysi ysl ysr yss yst ysy ytl ytr yts ytt yyb yys yyt yyy