-up b-p b-u bbb bbi bbl bbp bbs bbt bbu bi- bib bii bil bip bis bit biu blb bli bll blp bls blt blu bpb bpi bpl bpp bps bpt bpu bsb bsi bsl bsp bss bst bsu btb bti btl btp bts btt btu bub bui bul bup bus but buu ibb ibi ibl ibp ibs ibt ibu iib iii iil iip iis iit iiu il- ilb ili ill ilp ils ilt ilu ipb ipi ipl ipp ips ipt ipu is- isb isi isl isp iss ist isu itb iti itl itp its itt itu iu- iub iui iup ius iut l-p lbb lbi lbl lbp lbs lbt lbu lib lii lil lip lis lit liu llb lli lll llp lls llt llu lpb lpi lpl lpp lps lpt lpu lsb lsi lsl lsp lss lst lsu ltb lti ltl ltp lts ltt ltu lub lui lul lup lus lut luu p-p pbb pbi pbl pbp pbs pbt pbu pib pii pil pip pis pit piu plb pli pll plp pls plt plu ppb ppi ppl ppp pps ppt ppu ps- psb psi psl psp pss pst psu pt- ptb pti ptl ptp pts ptt ptu pub pui pul pup pus put puu sbb sbi sbl sbp sbs sbt sbu sib sii sil sip sis sit siu slb sli sll slp sls slt slu spb spi spl spp sps spt spu ss- ssb ssi ssl ssp sss sst ssu stb sti stl stp sts stt stu sub sui sul sup sus sut suu tbb tbi tbl tbp tbs tbt tbu tib tii til tip tis tit tiu tli tll tlp tls tlt tlu tpb tpi tpl tpp tps tpt tpu tsb tsi tsl tsp tss tst tsu ttb tti ttl ttp tts ttt ttu tub tui tul tup tus tut tuu ubb ubi ubl ubp ubs ubt ubu uib uii uil uip uis uit uiu ulb uli ull ulp uls ult ulu up- upb upi upp ups upt upu usb usi usl usp uss ust usu utb uti utl utp uts utt utu uus uut uuu