b-u bbb bbd bbi bbl bbm bbr bbt bbu bdb bdd bdi bdl bdm bdr bdt bdu bi- bib bid bii bil bim bir bit biu blb bld bli bll blm blr blt blu bmb bmd bmi bml bmm bmr bmt bmu brb brd bri brl brm brr brt bru btb btd bti btl btm btr btt btu bub bud bui bul bum bur but buu dbb dbd dbi dbl dbm dbr dbt dbu ddb ddd ddi ddl ddm ddr ddt ddu di- dib did dii dil dim dir dit diu dl- dlb dld dli dll dlm dlr dlt dlu dmb dmd dmi dml dmm dmr dmt dmu drb drd dri drl drm drr drt dru dtb dtd dti dtl dtm dtr dtt dtu dub dud dui dul dum dur dut i-d ibb ibd ibi ibl ibm ibr ibt ibu idb idd idi idl idm idr idt idu iib iid iii iil iim iir iit iiu il- ilb ild ili ill ilm ilr ilt ilu im- imb imd imi iml imm imt imu ir- irb ird iri irl irm irr irt iru itb itd iti itl itm itt itu iu- iub iud iui ium iur iut lbb lbd lbi lbl lbm lbr lbt lbu ldb ldd ldi ldl ldm ldr ldt ldu lib lid lii lil lim lir lit liu llb lld lli lll llm llr llt llu lmb lmd lmi lml lmm lmr lmt lmu lrb lrd lri lrm lrr lrt lru ltb ltd lti ltl ltm ltr ltt ltu lub lud lui lul lum lur lut luu m-r mbb mbd mbi mbl mbm mbr mbt mbu mdb mdd mdi mdl mdm mdr mdt mdu mi- mib mid mii mil mim mir mit miu mlb mld mli mll mlm mlr mlt mlu mmb mmd mmi mml mmm mmr mmt mmu mrb mrd mri mrl mrm mrr mrt mru mtb mtd mti mtl mtm mtr mtt mtu mub mud mui mul mum mur mut muu rbb rbd rbi rbl rbm rbr rbt rbu rdb rdd rdi rdl rdm rdr rdt rdu rib rid rii ril rim rir rit rld rli rll rlm rlr rlt rlu rmb rmd rmi rml rmm rmr rmt rrb rrd rri rrl rrm rrr rrt rru rtb rtd rti rtl rtm rtr rtt rtu rub rud rui rum rur rut ruu tbb tbd tbi tbl tbm tbr tbt tbu tdb tdd tdi tdl tdm tdr tdt tdu tib tid tii til tim tir tit tiu tld tli tll tlm tlr tlt tlu tmb tmd tmi tml tmm tmr tmt tmu trb trd tri trl trm trr trt tru ttb ttd tti ttl ttm ttr ttt ttu tub tud tui tul tum tur tut tuu ubb ubi ubl ubr ubt ubu udb udd udi udl udm udr udt udu uib uid uii uil uim uir uit uiu ulb uld uli ull ulm ulr ult ulu um- umb umd umi uml umm umr umt umu ur- urb urd uri url urm urr urt uru utb utd uti utl utm utr utt utu uum uur uut uuu