-ol -up b-p b-u bbb bbi bbl bbo bbp bbs bbt bbu bi- bib bii bil bio bip bis bit biu blb bli bll blo blp bls blt blu bob boi bol boo bop bos bot bou bpb bpi bpl bpo bpp bps bpt bpu bsb bsi bsl bso bsp bss bst bsu btb bti btl bto btp bts btt btu bub bui bul buo bup bus but buu ibb ibi ibl ibo ibp ibs ibt ibu iib iii iil iio iip iis iit iiu il- ilb ili ill ilo ilp ils ilt ilu io- iob ioi iol ioo iop ios iot iou ipb ipi ipl ipo ipp ips ipt ipu is- isb isi isl iso isp iss ist isu itb iti itl ito itp its itt itu iu- iub iui iup ius iut l-p lbb lbi lbl lbo lbp lbs lbt lbu lib lii lil lio lip lis lit liu llb lli lll llo llp lls llt llu lob loi lol loo lop los lot lou lpb lpi lpl lpo lpp lps lpt lpu lsb lsi lsl lso lsp lss lst lsu ltb lti ltl lto ltp lts ltt ltu lub lui lul luo lup lus lut luu o-i ob- obb obi obl obo obp obs obt obu oib oii oil oio oip ois oit oiu olb oli oll olo olp ols olt olu oo- oob ooi ool ooo oop oos oot op- opb opi opl opo opp ops opt os- osb osi osl oso osp oss ost osu ot- otb oti otl oto otp ots ott otu ou- oui oul ouo oup ous out p-p pbb pbi pbl pbo pbp pbs pbt pbu pib pii pil pio pip pis pit piu plb pli pll plo plp pls plt plu pob poi pol poo pop pos pot pou ppb ppi ppl ppo ppp pps ppt ppu ps- psb psi psl pso psp pss pst psu pt- ptb pti ptl pto ptp pts ptt ptu pub pui pul pup pus put puu sbb sbi sbl sbo sbp sbs sbt sbu sib sii sil sio sip sis sit siu slb sli sll slo slp sls slt slu sob soi sol soo sop sos sot sou spb spi spl spo spp sps spt spu ss- ssb ssi ssl sso ssp sss sst ssu stb sti stl sto stp sts stt stu sub sui sul suo sup sus sut suu tbb tbi tbl tbo tbp tbs tbt tbu tib tii til tio tip tis tit tiu tli tll tlo tlp tls tlt tlu to- tob toi tol too top tos tot tou tpb tpi tpl tpo tpp tps tpt tpu tsb tsi tsl tso tsp tss tst tsu ttb tti ttl tto ttp tts ttt ttu tub tui tul tuo tup tus tut tuu ubb ubi ubl ubo ubp ubs ubt ubu uib uii uil uio uip uis uit uiu ulb uli ull ulo ulp uls ult ulu uob uol uoo uop uos uot up- upb upi upo upp ups upt upu usb usi usl uso usp uss ust usu utb uti utl uto utp uts utt utu uus uut uuu