-ol fff ffl ffo ffp ffr ffs fft flf fll flo flp flr fls flt fof fol foo fop for fos fot fpl fpo fpp fpr fps fpt frf frl fro frp frr frs frt fsf fsl fso fsp fsr fss fst ftf ftl fto ftp ftr fts ftt l-p lff lfl lfo lfp lfr lfs lft llf lll llo llp llr lls llt lof lol loo lop lor los lot lpf lpl lpo lpp lpr lps lpt lrf lro lrp lrr lrs lrt lsf lsl lso lsp lsr lss lst ltf ltl lto ltp ltr lts ltt of- off ofl ofo ofp ofr ofs oft olf oll olo olp ols olt oo- oof ool ooo oop oor oos oot op- opf opl opo opp opr ops opt or- orf orl oro orp orr ors ort os- osf osl oso osp osr oss ost ot- otf otl oto otp otr ots ott p-p pff pfl pfo pfp pfr pfs pft plf pll plo plp plr pls plt pof pol poo pop por pos pot ppf ppl ppo ppp ppr pps ppt prf prl pro prp prr prs prt ps- psf psl pso psp psr pss pst pt- ptf ptl pto ptp ptr pts ptt rff rfl rfo rfp rfr rfs rft rlf rll rlo rlp rlr rls rlt rof rol roo rop ror ros rot rpf rpl rpo rpp rpr rps rpt rrf rrl rrp rrr rrs rrt rsf rsl rso rsp rsr rss rst rtf rtl rto rtp rtr rts rtt sff sfl sfo sfp sfr sfs sft slf sll slo slp slr sls slt sof sol soo sop sor sos sot spf spl spo spp spr sps spt sr- srf srl sro srp srr srs srt ss- ssf ssl sso ssp ssr sss sst stf stl sto stp str sts stt tff tfl tfo tfp tfr tfs tft tlf tll tlo tlp tlr tls tlt to- tof tol too top tor tos tot tpf tpl tpo tpp tpr tps tpt trf trl tro trp trr trs trt tsf tsl tso tsp tsr tss tst ttf ttl tto ttp ttr tts ttt