b-u bbb bbi bbl bbm bbn bbs bbt bbu bi- bib bii bil bim bin bis bit biu blb bli bll blm bln bls blt blu bmb bmi bml bmm bmn bms bmt bmu bnb bni bnl bnn bns bnt bnu bsb bsi bsl bsm bsn bss bst bsu btb bti btl btm btn bts btt btu bub bui bul bum bun bus but buu ibb ibi ibl ibm ibn ibs ibt ibu iib iii iil iim iin iis iit iiu il- ilb ili ill ilm iln ils ilt ilu im- imb imi iml imm imn ims imt imu in- inb ini inl inm inn ins int inu is- isb isi isl ism isn iss ist isu itb iti itl itm itn its itt itu iu- iub iui ium ius iut lbb lbi lbl lbm lbs lbt lbu lib lii lil lim lin lis lit liu llb lli lll llm lln lls llt llu lmb lmi lml lmm lmn lms lmt lmu lnb lni lnl lnm lnn lns lnt lnu lsb lsi lsl lsm lsn lss lst lsu ltb lti ltl ltm lts ltt ltu lub lui lul lum lun lus lut luu mbb mbi mbl mbm mbs mbt mbu mi- mib mii mil mim min mis mit miu mlb mli mll mlm mln mls mlt mlu mmb mmi mml mmm mmn mms mmt mmu mnb mni mnl mnm mnn mns mnt mnu msb msi msl msm msn mss mst msu mtb mti mtl mtm mtn mts mtt mtu mub mui mul mum mun mus mut muu n-i nbb nbi nbl nbm nbn nbs nbt nbu nib nii nil nim nin nis nit niu nlb nli nll nlm nln nls nlt nlu nmb nmi nml nmm nmn nms nmt nmu nnb nni nnl nnm nnn nns nnt nnu nsb nsi nsl nsm nsn nss nst nsu ntb nti ntm ntn nts ntt ntu nub nui nul num nun nus nut nuu sbb sbi sbl sbm sbn sbs sbt sbu sib sii sil sim sin sis sit siu slb sli sll slm sln sls slt slu smb smi sml smm smn sms smt smu snb sni snl snm snn sns snt snu ss- ssb ssi ssl ssm ssn sss sst ssu stb sti stl stm stn sts stt stu sub sui sul sum sun sus sut suu tbb tbi tbl tbm tbn tbs tbt tbu tib tii til tim tin tis tit tiu tli tll tlm tln tls tlt tlu tmb tmi tml tmm tmn tms tmt tmu tnb tni tnl tnm tnn tns tnt tsb tsi tsl tsm tsn tss tst tsu ttb tti ttl ttm ttn tts ttt ttu tub tui tul tum tun tus tut tuu ubb ubi ubl ubn ubs ubt ubu uib uii uil uim uin uis uit uiu ulb uli ull ulm uln uls ult ulu um- umb umi uml umm umn ums umt umu un- unb uni unl unm unn uns unt unu usb usi usl usm usn uss ust usu utb uti utl utm utn uts utt utu uum uun uus uut uuu