-ol -up b-p b-u bbb bbf bbl bbo bbp bbs bbt bbu bfb bff bfl bfo bfp bfs bft bfu blb blf bll blo blp bls blt blu bob bof bol boo bop bos bot bou bpb bpf bpl bpo bpp bps bpt bpu bsb bsf bsl bso bsp bss bst bsu btb btf btl bto btp bts btt btu bub buf bul buo bup bus but buu fbb fbf fbl fbo fbp fbs fbt fbu fff ffl ffo ffp ffs fft ffu flb flf fll flo flp fls flt flu fob fof fol foo fop fos fot fou fpb fpl fpo fpp fps fpt fpu fsb fsf fsl fso fsp fss fst fsu ftb ftf ftl fto ftp fts ftt ftu fub fuf ful fuo fup fus fut fuu l-p lbb lbf lbl lbo lbp lbs lbt lbu lfb lff lfl lfo lfp lfs lft lfu llb llf lll llo llp lls llt llu lob lof lol loo lop los lot lou lpb lpf lpl lpo lpp lps lpt lpu lsb lsf lsl lso lsp lss lst lsu ltb ltf ltl lto ltp lts ltt ltu lub luf lul luo lup lus lut luu ob- obb obf obl obo obp obs obt obu of- ofb off ofl ofo ofp ofs oft ofu olb olf oll olo olp ols olt olu oo- oob oof ool ooo oop oos oot op- opb opf opl opo opp ops opt os- osb osf osl oso osp oss ost osu ot- otb otf otl oto otp ots ott otu ou- ouf oul ouo oup ous out p-p pbb pbf pbl pbo pbp pbs pbt pbu pfb pff pfl pfo pfp pfs pft pfu plb plf pll plo plp pls plt plu pob pof pol poo pop pos pot pou ppb ppf ppl ppo ppp pps ppt ppu ps- psb psf psl pso psp pss pst psu pt- ptb ptf ptl pto ptp pts ptt ptu pub puf pul pup pus put puu sbb sbf sbl sbo sbp sbs sbt sbu sfb sff sfl sfo sfp sfs sft sfu slb slf sll slo slp sls slt slu sob sof sol soo sop sos sot sou spb spf spl spo spp sps spt spu ss- ssb ssf ssl sso ssp sss sst ssu stb stf stl sto stp sts stt stu sub suf sul suo sup sus sut suu tbb tbf tbl tbo tbp tbs tbt tbu tfb tff tfl tfo tfp tfs tft tfu tlf tll tlo tlp tls tlt tlu to- tob tof tol too top tos tot tou tpb tpf tpl tpo tpp tps tpt tpu tsb tsf tsl tso tsp tss tst tsu ttb ttf ttl tto ttp tts ttt ttu tub tuf tul tuo tup tus tut tuu ubb ubf ubl ubo ubp ubs ubt ubu uff ufl ufo ufp ufs uft ufu ulb ulf ull ulo ulp uls ult ulu uob uol uoo uop uos uot up- upb upf upo upp ups upt upu usb usf usl uso usp uss ust usu utb utf utl uto utp uts utt utu uus uut uuu