-ol b-p bbb bbi bbl bbo bbp bbr bbs bbt bi- bib bii bil bio bip bir bis bit blb bli bll blo blp blr bls blt bob boi bol boo bop bor bos bot bpb bpi bpl bpo bpp bpr bps bpt brb bri brl bro brp brr brs brt bsb bsi bsl bso bsp bsr bss bst btb bti btl bto btp btr bts btt ibb ibi ibl ibo ibp ibr ibs ibt iib iii iil iio iip iir iis iit il- ilb ili ill ilo ilp ilr ils ilt io- iob ioi iol ioo iop ior ios iot ipb ipi ipl ipo ipp ipr ips ipt ir- irb iri irl iro irp irr irs irt is- isb isi isl iso isp isr iss ist itb iti itl ito itp its itt l-p lbb lbi lbl lbo lbp lbr lbs lbt lib lii lil lio lip lir lis lit llb lli lll llo llp llr lls llt lob loi lol loo lop lor los lot lpb lpi lpl lpo lpp lpr lps lpt lrb lri lro lrp lrr lrs lrt lsb lsi lsl lso lsp lsr lss lst ltb lti ltl lto ltp ltr lts ltt o-i ob- obb obi obl obo obp obr obs obt oib oii oil oio oip oir ois oit olb oli oll olo olp ols olt oo- oob ooi ool ooo oop oor oos oot op- opb opi opl opo opp opr ops opt or- orb ori orl oro orp orr ors ort os- osb osi osl oso osp osr oss ost ot- otb oti otl oto otp otr ots ott p-p pbb pbi pbl pbo pbp pbr pbs pbt pib pii pil pio pip pir pis pit plb pli pll plo plp plr pls plt pob poi pol poo pop por pos pot ppb ppi ppl ppo ppp ppr pps ppt prb pri prl pro prp prr prs prt ps- psb psi psl pso psp psr pss pst pt- ptb pti ptl pto ptp ptr pts ptt rbb rbi rbl rbo rbp rbr rbs rbt rib rii ril rio rip rir ris rit rli rll rlo rlp rlr rls rlt rob roi rol roo rop ror ros rot rpb rpi rpl rpo rpp rpr rps rpt rrb rri rrl rrp rrr rrs rrt rsb rsi rsl rso rsp rsr rss rst rtb rti rtl rto rtp rtr rts rtt sbb sbi sbl sbo sbp sbr sbs sbt sib sii sil sio sip sir sis sit slb sli sll slo slp slr sls slt sob soi sol soo sop sor sos sot spb spi spl spo spp spr sps spt sr- srb sri srl sro srp srr srs srt ss- ssb ssi ssl sso ssp ssr sss sst stb sti stl sto stp str sts stt tbb tbi tbl tbo tbp tbr tbs tbt tib tii til tio tip tir tis tit tli tll tlo tlp tlr tls tlt to- tob toi tol too top tor tos tot tpb tpi tpl tpo tpp tpr tps tpt trb tri trl tro trp trr trs trt tsb tsi tsl tso tsp tsr tss tst ttb tti ttl tto ttp ttr tts ttt