b-u bbb bbi bbl bbm bbr bbt bbu bi- bib bii bil bim bir bit biu blb bli bll blm blr blt blu bmb bmi bml bmm bmr bmt bmu brb bri brl brm brr brt bru btb bti btl btm btr btt btu bub bui bul bum bur but buu ibb ibi ibl ibm ibr ibt ibu iib iii iil iim iir iit iiu il- ilb ili ill ilm ilr ilt ilu im- imb imi iml imm imt imu ir- irb iri irl irm irr irt iru itb iti itl itm itt itu iu- iub iui ium iur iut lbb lbi lbl lbm lbr lbt lbu lib lii lil lim lir lit liu llb lli lll llm llr llt llu lmb lmi lml lmm lmr lmt lmu lrb lri lrm lrr lrt lru ltb lti ltl ltm ltr ltt ltu lub lui lul lum lur lut luu m-r mbb mbi mbl mbm mbr mbt mbu mi- mib mii mil mim mir mit miu mlb mli mll mlm mlr mlt mlu mmb mmi mml mmm mmr mmt mmu mrb mri mrl mrm mrr mrt mru mtb mti mtl mtm mtr mtt mtu mub mui mul mum mur mut muu rbb rbi rbl rbm rbr rbt rbu rib rii ril rim rir rit rli rll rlm rlr rlt rlu rmb rmi rml rmm rmr rmt rrb rri rrl rrm rrr rrt rru rtb rti rtl rtm rtr rtt rtu rub rui rum rur rut ruu tbb tbi tbl tbm tbr tbt tbu tib tii til tim tir tit tiu tli tll tlm tlr tlt tlu tmb tmi tml tmm tmr tmt tmu trb tri trl trm trr trt tru ttb tti ttl ttm ttr ttt ttu tub tui tul tum tur tut tuu ubb ubi ubl ubr ubt ubu uib uii uil uim uir uit uiu ulb uli ull ulm ulr ult ulu um- umb umi uml umm umr umt umu ur- urb uri url urm urr urt uru utb uti utl utm utr utt utu uum uur uut uuu